Statutes, codes, and regulations
District Of Columbia Administrative Code
Title 12 - CONSTRUCTION CODES SUPPLEMENT OF 2013Subtitle 12-C - ELECTRIC CODE SUPPLEMENT OF 2013
Chapter 12-C4 - EQUIPMENT FOR GENERAL USE
Rule 12-C408 - SWITCHBOARDS AND PANELBOARDS

D.C. Mun. Regs. tit. 12, r. 12-C408

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Current through Register Vol. 72, No. 2, January 10, 2025
Rule 12-C408 - SWITCHBOARDS AND PANELBOARDS

Insert new Section 408.23 in Article 408 of the National Electrical Code to read as follows:

408.23

Switchboards of 1000 Amperes or Larger. It shall be the responsibility of the owner of a switchboard having a capacity of 1000 amperes or larger, or the owner's responsible agent, to have a licensed master electrician disconnect said equipment once every three years or less to perform prescribed preventive maintenance. Preventive maintenance shall consist of, but not be limited to:

1. Vacuum entire interior of switchboard.
2. Clean bus and contacts with suitable non-conductive solvents.
3. Lubricate all moving mechanisms.
4. Check all conductors for abrasions and deterioration; recommend replacement if found to be in poor condition.
5. Torque bus and conductor connections to manufacturers' recommended specifications.
6. Check calibration of overcurrent trip units and protective devices.
7. Megger board to manufacturers' specifications before re-energizing.
8. Replace worn, damaged or deteriorating components.

A copy of current inspection and service reports shall be available for public inspection on site.

D.C. Mun. Regs. tit. 12, r. 12-C408

Final Rulemaking published at 61 DCR 3093 (March 28, 2014 - Part 2)
The District of Columbia Electrical Code (2013), referred to as the "Electrical Code," consists of the 2011 edition of the National Electrical Code, published by the National Fire Protection Association (NFPA), as amended by the District of Columbia Electrical Code Supplement (2013)(12 DCMR C). The National Electrical Code is copyrighted by the National Fire Protection Association and therefore is not republished here. However, a copy of the text may be obtained at:http://www.nfpa.org.
Authority: Section 10 of the Construction Codes Approval and Amendments Act of 1986 (Act), effective March 21, 1987 (D.C. Law 6-216; D.C. Official Code § 6-1409 (2012 Repl.)) and Mayor's Order 2009-22, dated February 25, 2009, as amended.