UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 6-K

Report of Foreign Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

Dated November 29, 2017

Commission file number 001-15254

ENBRIDGE INC.

(Exact name of Registrant as specified in its charter)

200, 425 – 1^st Street S.W.

Calgary, Alberta, Canada T2P 3L8

(Address of principal executive offices and postal code)

Indicate by check mark whether the Registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F  ☐            Form 40-F  ☑

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes  ☐            No  ☑

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by regulation S-T Rule 101(b)(7):

Yes  ☐            No  ☑

THIS REPORT ON FORM 6-K SHALL BE DEEMED TO BE INCORPORATED BY REFERENCE IN THE REGISTRATION STATEMENTS ON FORM S-8 (FILE NO. 333-216272, 333-145236, 333-127265, 333-13456, 333-97305 AND 333-6436) AND FORM F-3 (FILE NO. 333-221507) OF ENBRIDGE INC. AND TO BE PART THEREOF FROM THE DATE ON WHICH THIS REPORT IS FURNISHED, TO THE EXTENT NOT SUPERSEDED BY DOCUMENTS OR REPORTS SUBSEQUENTLY FILED OR FURNISHED.

The following documents are being submitted herewith:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

NEWS RELEASE

Enbridge announces offering of CDN$1.5 billion of common shares by private placement

CALGARY, ALBERTA — (November 29, 2017) — Enbridge Inc. (TSX, NYSE: ENB) today announced that it has entered into subscription agreements with three large institutional investors to issue 33,456,003 common shares from treasury, on a private placement basis, at a price of CDN$44.84 per common share, for gross proceeds of approximately CDN$1.5 billion (the Offering). The proceeds from the Offering will be used to pay down short term indebtedness pending investment in capital projects.

Closing of the Offering is expected to occur on or about December 6, 2017 and is subject to the review and approval of the Toronto Stock Exchange.

This press release shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor will there be any sale of these securities, in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

About Enbridge Inc.

Enbridge Inc. is North America’s premier energy infrastructure company with strategic business platforms that include an extensive network of crude oil, liquids and natural gas pipelines, regulated natural gas distribution utilities and renewable power generation. The Company safely delivers an average of 2.8 million barrels of crude oil each day through its Mainline and Express Pipeline; accounts for approximately 65% of U.S.-bound Canadian crude oil exports; and moves approximately 20% of all natural gas consumed in the U.S., serving key supply basins and demand markets. The Company’s regulated utilities serve approximately 3.6 million retail customers in Ontario, Quebec, New Brunswick and New York State. Enbridge also has a growing involvement in electricity infrastructure with interests in more than 2,500 MW of net renewable generating capacity in North America and Europe. The Company has ranked on the Global 100 Most Sustainable Corporations index for the past eight years; its common shares trade on the Toronto and New York stock exchanges under the symbol ENB.

Forward Looking Statements

Forward-looking information, or forward-looking statements, have been included in this news release to provide information about the Offering, the number of securities to be issued, the investors participating in the Offering and the expected closing date of the Offering. This information may not be appropriate for other purposes. Forward-looking statements are typically identified by words such as “anticipate”, “expect”, “project”, “estimate”, “forecast”, “plan”, “intend”, “target”, “believe”, “likely” and similar words suggesting future outcomes or statements regarding an outlook.

Although Enbridge believes these forward-looking statements are reasonable based on the information available on the date such statements are made and processes used to prepare the information, such statements are not guarantees of future performance and readers are cautioned against placing undue reliance on forward-looking statements. By their nature, these statements involve a variety of assumptions, known and unknown risks and uncertainties and other factors, which may cause actual results, levels of activity and achievements to differ materially from those expressed or implied by such statements. Material assumptions include assumptions about the following: regulatory and third party approvals not being obtained in the manner or timing anticipated, the state of domestic capital markets, changes in general market conditions and other factors more fully described from time to time in the reports and filings made by the Company with securities regulatory authorities.

Due to the interdependencies and correlation of these macroeconomic factors, the impact of any one assumption on a forward-looking statement cannot be determined with certainty. Except to the extent required by applicable law, Enbridge assumes no obligation to publicly update or revise any forward-looking statements made in this news release or otherwise, whether as a result of new information, future events or otherwise. All subsequent forward-looking statements, whether written or oral, attributable to Enbridge or persons acting on the Company’s behalf, are expressly qualified in their entirety by these cautionary statements.

FOR FURTHER INFORMATION PLEASE CONTACT:

Media

Suzanne Wilton

(403) 231-7385 or Toll Free: 1-888-992-0997

Email: suzanne.wilton@enbridge.com

Investment Community

Jonathan Gould

(403) 231-3916 or Toll Free: 1-800-481-2804

Email: jonathan.gould@enbridge.com

NEWS RELEASE

Enbridge Completes Strategic Plan and Financial Outlook; Announces Dividend Increase of 10% for 2018 and Confirms Growth Through 2020

CALGARY, ALBERTA – November 29, 2017 – Enbridge Inc. (Enbridge or the Company) (TSX:ENB)(NYSE:ENB) today announced the finalization of its strategic plan and outlook (the Plan) following the merger with Spectra Energy, which closed on February 27, 2017. The Plan includes a three-year financial outlook covering 2018 – 2020. The following summarizes the key elements of the Plan, which will be further discussed at the Company’s investor conferences on December 12^th and 13^th, in New York and Toronto, respectively.

Highlights

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Strategic Priorities

Enbridge is now the largest energy infrastructure company in North America with consolidated assets totaling over C$160 billion as at September 30, 2017, covering the most important and growing energy demand markets and supply basins. Enbridge’s key strategic priorities are as follows:

Commenting on the strategic plan and outlook, Al Monaco, President and CEO of Enbridge noted; “2017 has been an important transition year for Enbridge. The acquisition of Spectra Energy has significantly diversified our asset base and opportunity set, and repositioned Enbridge for the future, particularly with respect to natural gas which we see as having excellent fundamentals and opportunities going forward. Integration is going well and synergy capture is on target. We have continued to successfully execute on our secured capital program, with roughly $12 billion of new projects expected to be put into service in 2017.”

Mr. Monaco continued, “With the Spectra Energy assets now in the fold, we will focus our attention on what we do best and the value proposition that has served shareholders well over the years. We will rationalize our asset mix to a pure regulated pipeline and utility business model, which emphasizes low risk businesses and strong growth in our three crown jewel businesses: liquids pipelines and terminals, natural gas transmission and storage and natural gas utilities. These franchises represent critical energy infrastructure with un-paralleled competitive positions, highly predictable cash flows and embedded growth. Through this review, we’ve identified a total of $10 billion of assets that are non-core to Enbridge. In 2018, at least $3 billion of certain unregulated gas midstream and onshore renewables businesses will be sold or monetized.”

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Balance Sheet Strengthening Actions

The Company’s financing plan has been designed to fund its industry leading secured growth program while deleveraging the balance sheet. The plan achieves strong, investment grade credit metrics throughout the three-year period, with its Debt to EBITDA metric expected to reach 5x by the end of 2018, and trending to approximately 4.5x by 2020.

Total spending on secured growth and maintenance capital is expected to be approximately $22 billion through the end of 2020. This capital funding requirement, together with targeted debt reduction of approximately $4 billion, will be satisfied with the following sources:

A combination of DRIP and sponsored vehicle equity will satisfy the remaining requirement. As such, no further follow-on Enbridge Inc. common equity is required to support the current financing plan. In addition, the Company can create significant further financing flexibility through incremental non-core asset sales or monetizations, issuance of hybrid securities and sponsored vehicle financing actions.

Mr. Monaco commented, “With on-going execution of our secured capital investment program, it’s important that we maintain a strong financial position and financing flexibility, which this plan achieves. Over the last two years, excluding the common equity issued today, we’ve raised approximately $7.5 billion in equity or equity equivalent funding, financed the Spectra acquisition with 100% equity and sold or monetized $2.6 billion in non-core assets, which demonstrates our commitment to pro-active management of the balance sheet during this period of growth. The asset sales and further actions we’re announcing today, along with our three-year financing plan, will provide the capital required to fund our secured growth program and provide the financial flexibility going forward to support the execution of our strategy.”

2018 Guidance and Three-Year Financial Outlook

Enbridge expects 2018 ACFFO/share from its existing operation and secured-only capital program in the range of $4.15 to $4.45/share, inclusive of the dilutive effect of the $1.5 billion common equity issuance announced today and the other planned funding and asset sale actions noted above. The secured-only financial outlook implies a three-year compound annual growth rate in ACFFO/share of approximately 10% off of the midpoint 2017 guidance range of $3.60—$3.90/share, ending with a midpoint of approximately $5/share of ACFFO in 2020.

Dividend Increase and Dividend Growth Outlook

The Board of Directors approved an increase in the annual Dividend of 10% for 2018. The new quarterly dividend of $0.671/share will be payable on March 1, 2018, to shareholders of record on February 15, 2018. Enbridge expects to continue to deliver annual dividend growth of 10% through 2020, which is expected to result in a dividend payout through the planning horizon of below 65% of ACFFO/share.

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Commenting on the dividend increase, Mr. Monaco noted: “Over the decades, Enbridge has delivered superior shareholder value. Our low risk business model has resulted in strong and consistent growth in the dividend which we are continuing to deliver though this Plan period.”

Sponsored Vehicles

Three-year financial plans for the sponsored vehicles were also approved by Enbridge, as well as the Boards of Directors of Spectra Energy Partners, Enbridge Energy Partners and Enbridge Income Fund. Each of the Sponsored vehicles is expected to maintain solid distribution growth, strong distribution coverage, and solid investment grade credit ratings:

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In addition, today Enbridge made a formal offer to Spectra Energy Partners, LP (NYSE:SEP) (SEP) to convert all of Enbridge’s incentive distribution rights (IDRs) and general partner (GP) economic interests in SEP into a fixed number of additional common units in SEP and a non-economic GP interest in SEP. Through this proposal, Enbridge seeks to highlight the value of its IDRs and GP economic interest in SEP, and reduce SEP’s cost of capital to support the sustainable long-term growth of the partnership. Enbridge would continue to act as SEP’s general partner. Enbridge expects the proposed transaction to be appropriately reviewed by SEP’s Board of Directors, including by a conflicts committee comprised of independent members of the SEP board. No assurance can be given that Enbridge and SEP will reach agreement on the proposed transaction.

FORWARD-LOOKING INFORMATION

Forward-looking information, or forward-looking statements, have been included in this news release to provide information about the Company and its subsidiaries and affiliates, including management’s assessment of Enbridge and its subsidiaries’ future plans and operations. This information may not be appropriate for other purposes. Forward-looking statements are typically identified by words such as “anticipate”, “expect”, “project”, “estimate”, “forecast”, “plan”, “intend”, “target”, “believe”, “likely” and similar words suggesting future outcomes or statements regarding an outlook. Forward-looking information or statements included or incorporated by reference in this document include, but are not limited to, statements with respect to the following: expected ACFFO or ACFFO per share; expected future dividends and dividend growth; expected debt to EBITA ratios; expected monetization of assets and future asset mix of the Company; completion of announced common equity issuances; future common equity and hybrid securities issuances; expected proceeds of the dividend reinvestment program; financial strength and flexibility; expectations on sources of liquidity and sufficiency of financial resources; expected costs related to announced projects and projects under construction; expected in-service dates for announced projects and projects under construction; expected capital expenditures; expected impact on cash flows of the Company’s commercially secured growth program; expected future growth and expansion opportunities; expectations regarding integration of Spectra Energy Corp (“Spectra”) and associated synergy capture; exchange of incentive distribution rights and units of SEP; impact of an exchange of incentive distribution rights of SEP on SEP’s cost of capital; the Company’s scale, financial flexibility, growth program, future business prospects and performance; distribution payout policy and distributable cash flow growth; distribution growth and dividend payout expectation; and changes to Enbridge’s corporate structure.

Although Enbridge believes these forward-looking statements are reasonable based on the information available on the date such statements are made and processes used to prepare the information, such statements are not guarantees of future performance and readers are cautioned against placing undue reliance on forward-looking statements. By their nature, these statements involve a variety of assumptions, known and unknown risks and uncertainties and

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other factors, which may cause actual results, levels of activity and achievements to differ materially from those expressed or implied by such statements. Material assumptions include assumptions about the following: the expected supply of and demand for crude oil, natural gas, natural gas liquids (NGL) and renewable energy; prices of crude oil, natural gas, NGL and renewable energy; exchange rates; inflation; interest rates; availability and price of labour and construction materials; operational reliability; customer and regulatory approvals; maintenance of support and regulatory approvals for the Company’s projects; anticipated in-service dates; weather; governmental legislation; acquisitions and dispositions and the timing and terms thereof; the success of integration plans; impact of capital project execution on the Company’s future cash flows; credit ratings; capital project funding; expected future cash flows and expected future ACFFO and ACFFO per share; and estimated future dividends and distributions. Assumptions regarding the expected supply of and demand for crude oil, natural gas, NGL and renewable energy, and the prices of these commodities, are material to and underlie all forward-looking statements, as they may impact current and future levels of demand for the Company’s services. Similarly, exchange rates, inflation and interest rates impact the economies and business environments in which the Company operates and may impact levels of demand for the Company’s services and cost of inputs, and are therefore inherent in all forward-looking statements.

Due to the interdependencies and correlation of these macroeconomic factors, the impact of any one assumption on a forward-looking statement cannot be determined with certainty, particularly with respect to expected ACFFO and distributable cash flow and associated per share amounts, or estimated future dividends or distributions. The most relevant assumptions associated with forward-looking statements on announced projects and projects under construction, including estimated completion dates and expected capital expenditures, include the following: the availability and price of labour and construction materials; the effects of inflation and foreign exchange rates on labour and material costs; the effects of interest rates on borrowing costs; the impact of weather and customer, government and regulatory approvals on construction and in-service schedules and cost recovery regimes.

Enbridge’s forward-looking statements are subject to risks and uncertainties pertaining to operating performance, regulatory parameters, dividend policy, project approval and support, renewals of rights of way, weather, economic and competitive conditions, public opinion, changes in tax laws and tax rates, changes in trade agreements, exchange rates, interest rates, commodity prices, political decisions and supply of and demand for commodities, including but not limited to those risks and uncertainties discussed in this news release and in the Company’s other filings with Canadian and United States securities regulators. The impact of any one risk, uncertainty or factor on a particular forward-looking statement is not determinable with certainty as these are interdependent and Enbridge’s future course of action depends on management’s assessment of all information available at the relevant time. Except to the extent required by applicable law, Enbridge assumes no obligation to publicly update or revise any forward-looking statements made in this news release or otherwise, whether as a result of new information, future events or otherwise. All subsequent forward-looking statements, whether written or oral, attributable to Enbridge or persons acting on the Company’s behalf, are expressly qualified in their entirety by these cautionary statements.

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ABOUT ENBRIDGE INC.

Enbridge Inc. is North America’s premier energy infrastructure company with strategic business platforms that include an extensive network of crude oil, liquids and natural gas pipelines, regulated natural gas distribution utilities and renewable power generation. The Company safely delivers an average of 2.8 million barrels of crude oil each day through its Mainline and Express Pipeline; accounts for approximately 65% of U.S.-bound Canadian crude oil exports; and moves approximately 20% of all natural gas consumed in the U.S., serving key supply basins and demand markets. The Company’s regulated utilities serve approximately 3.6 million retail customers in Ontario, Quebec, New Brunswick and New York State. Enbridge also has a growing involvement in electricity infrastructure with interests in more than 2,500 MW of net renewable generating capacity in North America and Europe. The Company has ranked on the Global 100 Most Sustainable Corporations index for the past eight years; its common shares trade on the Toronto and New York stock exchanges under the symbol ENB.

Life takes energy and Enbridge exists to fuel people’s quality of life. For more information, visit www.enbridge.com.

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NEWS RELEASE

Enbridge Announces 10 Percent Quarterly Dividend Increase for 2018

CALGARY, ALBERTA, November 29, 2017 — Enbridge Inc. (TSX and NYSE:ENB) (Enbridge or the Company) announced today that its Board of Directors has declared a quarterly dividend of $0.671 per common share, payable on March 1, 2018 to shareholders of record on February 15, 2018. The declared dividend represents a 10 percent increase from the prior quarterly rate and the twenty-third consecutive year in which the Company has increased its common share dividend.

DIVIDEND DECLARATION

On November 29, 2017, the Enbridge Board of Directors declared the following quarterly dividends. All dividends are payable on March 1, 2018 to shareholders of record on February 15, 2018.

About Enbridge Inc.

Enbridge Inc. is North America’s premier energy infrastructure company with strategic business platforms that include an extensive network of crude oil, liquids and natural gas pipelines, regulated natural gas distribution utilities and renewable power generation. The Company safely delivers an average of 2.8 million barrels of crude oil each day through its Mainline and Express Pipeline; accounts for approximately 65% of U.S.-bound Canadian crude oil exports; and moves approximately 20% of all natural gas consumed in the U.S., serving key supply basins and demand markets. The Company’s regulated utilities serve approximately 3.6 million retail customers in Ontario, Quebec, New Brunswick and New York State. Enbridge also has a growing involvement in electricity infrastructure with interests in more than 2,500 MW of net renewable generating capacity in North America and Europe. The Company has ranked on the Global 100 Most Sustainable Corporations index for the past eight years; its common shares trade on the Toronto and New York stock exchanges under the symbol ENB.

Life takes energy and Enbridge exists to fuel people’s quality of life. For more information, visit www.enbridge.com.

FOR FURTHER INFORMATION PLEASE CONTACT: