QuickLinks -- Click here to rapidly navigate through this document

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

        We consent to the incorporation by reference in Registration Statement No. 333-68650 on Form S-4 and Nos. 33-24043, 333-29843, 333-29851, 333-29855, 333-61766, 333-69250, 333-69252, 333-70245, 333-82645, 333-82647, 333-106897, 333-109112, 333-139351, 333-139352 and 333-186817 all on Form S-8 of our reports dated February 20, 2015, relating to the consolidated financial statements of SPX Corporation and subsidiaries (the "Company") and the effectiveness of the Company's internal control over financial reporting, appearing in this Annual Report on Form 10-K of the Company for the year ended December 31, 2014.

/s/ Deloitte & Touche LLP

Charlotte, North Carolina
February 20, 2015

QuickLinks

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm