Exhibit 5.1

	12670 High Bluff Drive
March 12, 2015	San Diego, California 92130
	Tel:  +1.858.523.5400  Fax: +1.858.523.5450   www.lw.com
	FIRM / AFFILIATE OFFICES
	Abu Dhabi	Milan
	Barcelona	Moscow
	Beijing	Munich
	Boston	New Jersey
	Brussels	New York
	Century City	Orange County
	Chicago	Paris
	Doha	Riyadh
	Dubai	Rome
	Düsseldorf	San Diego
	Frankfurt	San Francisco
	Hamburg	Shanghai
San Diego Gas & Electric Company	Hong Kong	Silicon Valley
8326 Century Park Court	Houston	Singapore
San Diego, California 92123	London	Tokyo
Re:   Registration Statement No. 333-181639; Issuance of $140,000,000 Aggregate Principal Amount of Floating Rate First Mortgage Bonds, Series OOO, due 2017 and $250,000,000 Aggregate Principal Amount of 1.914% Amortizing First Mortgage Bonds, Series PPP, due 2022	Los Angeles   Madrid	Washington, D.C.

Ladies and Gentlemen:

We have acted as special counsel to San Diego Gas & Electric Company, a California corporation (the “Company”), in connection with the Company’s issuance of $140,000,000 aggregate principal amount of Floating Rate First Mortgage Bonds, Series OOO, due 2017 (the “Series OOO Bonds”) and $250,000,000 aggregate principal amount of 1.914% Amortizing First Mortgage Bonds, Series PPP, due 2022 (the “Series PPP Bonds” and, together with the Series OOO Bonds, the “Bonds”) under an indenture, dated as of July 1, 1940, between the Company and U.S. Bank National Association, as successor trustee (the “Trustee”), as amended and supplemented to date, including as supplemented by the Sixty-Third Supplemental Indenture, dated March 12, 2015 and the Sixty-Fourth Supplemental Indenture, dated March 12, 2015 (the “Indenture”), between the Company and the Trustee, setting forth the terms of the Bonds, and pursuant to a registration statement on Form S-3 under the Securities Act of 1933, as amended (the “Act”), filed with the Securities and Exchange Commission (the “Commission”) on May 24, 2012 (Registration No. 333-181639) (as amended, the “Registration Statement”), and an underwriting agreement, dated March 9, 2015, between the underwriters named therein and the Company.

This opinion is being furnished in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as to any matter pertaining to the contents of the Registration Statement or related prospectus, other than as expressly stated herein with respect to the issue of the Bonds.

March 12, 2105

Page 2

As such counsel, we have examined such matters of fact and questions of law as we have considered appropriate for purposes of this letter. With your consent, we have relied upon certificates and other assurances of officers of the Company and others as to factual matters without having independently verified such factual matters. We are opining herein as to the internal laws of the State of California and we express no opinion with respect to the applicability thereto, or the effect thereon, of the laws of any other jurisdiction or as to any matters of municipal law or the laws of any local agencies within any state.

Subject to the foregoing and the other matters set forth herein, it is our opinion that, as of the date hereof, the Bonds have been duly authorized by all necessary corporate action of the Company and are the legally valid and binding obligations of the Company, enforceable against the Company in accordance with their terms.

Our opinion is subject to: (i) the effect of bankruptcy, insolvency, reorganization, fraudulent transfer, moratorium or other similar laws relating to or affecting the rights and remedies of creditors; (ii) the effect of general principles of equity, whether considered in a proceeding in equity or at law (including the possible unavailability of specific performance or injunctive relief), concepts of materiality, reasonableness, good faith and fair dealing, and the discretion of the court before which a proceeding is brought; (iii) the invalidity under certain circumstances under law or court decisions of provisions providing for the indemnification of or contribution to a party with respect to a liability where such indemnification or contribution is contrary to public policy; and (iv) we express no opinion with respect to (a) any provision for liquidated damages, default interest, late charges, monetary penalties, make whole premiums or other economic remedies to the extent such provisions are deemed to constitute a penalty; (b) consents to, or restrictions upon, governing law, jurisdiction, venue, arbitration, remedies, or judicial relief; (c) advance waivers of claims, defenses, rights granted by law, or notice, opportunity for hearing, evidentiary requirements, statutes of limitation, trial by jury or at law, or other procedural rights, including the waiver of rights or defenses contained in Article XII, Section 12 of the Indenture; (d) any provision requiring the payment of attorneys’ fees, where such payment is contrary to law or public policy, and we call to your attention the provisions of Sections 1717 and 1717.5 of the California Civil Code, which limit and create obligations for the payment of attorneys’ fees; (e) any provision permitting, upon acceleration of the Bonds, collection of that portion of the stated principal amount thereof which might be determined to constitute unearned interest thereon; (f) waivers of broadly or vaguely stated rights; (g) provisions prohibiting, restricting, or requiring consent to assignment or transfer of any right or property, or the effect thereon of California Civil Code Section 711; and (h) the severability, if invalid, of provisions to the foregoing effect. We do not render any opinion herein with respect to the creation, validity, perfection or priority of any security interest.

With your consent, we have assumed (a) that the Indenture and the Bonds (collectively, the “Documents”) have been duly authorized, executed and delivered by the parties thereto other than the Company, (b) that the Documents constitute legally valid and binding obligations of the parties thereto other than the Company, enforceable against each of them in accordance with their respective terms, and (c) that the status of the Documents as legally valid and binding obligations of the parties is not affected by any (i) breaches of, or defaults under, agreements or

March 12, 2105

Page 3

instruments, (ii) violations of statutes, rules, regulations or court or governmental orders, or (iii) failures to obtain required consents, approvals or authorizations from, or make required registrations, declarations or filings with, governmental authorities.

This opinion is for your benefit in connection with the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act. We consent to your filing this opinion as an exhibit to the Company’s Form 8-K dated March 9, 2015 and to the reference to our firm contained in the prospectus for the offering of the Bonds under the heading “Legal Matters.” In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission thereunder.

Very truly yours,

/s/ Latham & Watkins LLP