EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement Nos. 333-157619, 333-164389 and 333-166446 on Form S-3 and Registration Statement Nos. 333-139661 and 333-149106 on Form S-8 of our report dated February 24, 2011, relating to the consolidated financial statements and financial statement schedule of Spectra Energy Corp, and the effectiveness of Spectra Energy Corp’s internal control over financial reporting, appearing in this Annual Report on Form 10-K of Spectra Energy Corp for the year ended December 31, 2010.

/s/     Deloitte & Touche LLP        

Houston, Texas

February 24, 2011