On July 13, 2011, Maine Governor Paul LePage signed legislation updating the Electric Installation Standards. The Maine Office of Licensing and Registration, Electricians Examining Board recently amended and approved to the standards, which replaces the reference to 2008 National Electrical Code (NEC) with a reference to the 2011 NEC. The 2011 NEC, with six technical amendments, becomes effective on July 19, 2011.
The previous version of the standards had eighteen amendments, including ten amendments relating to securing and supporting raceway systems (342.30, 342.30(C), 344.30, 344.30(C), 352.30, 352.30(C), 355.30, 355.30(C), 358.30 and 358.30(C)). All ten amendments were deleted, because changes in the 2011 NEC reflect the intent of the amendments. Other amendments that were deleted are as follows:
Amendment to 210.8(A) Exception (5) was deleted. This amendment allowed a single non-GFCI-protected receptacle connected to an individual branch circuit to supply a sump pump provided that a GFCI protected receptacle was located within 3 feet of the sump pump receptacle.
Amendment to 338.10 (4) (a) was deleted. This amendment required the ampacity of Type SE service-entrance cable used for interior wiring to be in accordance with the 60C (194F) conductor temperature rating.
Existing amendments to 210.5(C) and 215.12(C) were retained. These sections address the identification of branch circuits and feeders respectively. These amendments disallow documentation as a method of identification. A new amendment to 200.6 was added similar to these to address the identification of grounded conductors.
Existing revisions to Article 334 Nonmetallic Sheathed Cable were retained. The revisions include a modification to 334.10(3), which allows the cable type in structures that are permitted to be of Types III, IV, and V construction without concealment in walls, floors, or ceilings that provide a thermal barrier of at least a 15-minute finish rating. The other modification deletes 334.12(A)(2), thereby permitting the cable to be installed exposed in dropped or suspended ceilings in other than one- and two-family and multifamily dwellings.
Also retained were the modifications to 338.12(B)(1) and (2), which permits Type USE cable to be installed in building or structure up to the first termination.
The existing amendment to 702.4 was also retained and exempts single-family dwellings from this provision, which requires a generator to be sized to carry the entire transferred load when automatic transfer equipment is used.
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