Section R. 408.30537b - Power and lighting distributionRule 537b.
Sections E3901.11, E3905.3.2, E3908.9, and E3908.10, are amended and E3908.9.1, E3908.9.1.1 and E3908.9.1.2 are added to read as follows:
E3901.11. Foyers. Foyers that are not part of a hallway in accordance with Section E3901.10 and that have an area that is greater than 100 feet2 (9.2903 m2) shall have a receptacle(s) located in each wall space that is 3 feet (914 mm) or more in width. Doorways, door-side windows that extend to the floor and similar openings shall not be considered as wall space. [210.52(I) amended]E3905.3.2. Securing to box. All permitted wiring methods shall be secured to the boxes. Exception: Where nonmetallic-sheathed cable is used with boxes not larger than a nominal size of 2 1/4 inches by 4 inches (57 mm by 102 mm) mounted in walls or ceilings, and where the cable is fastened within 8 inches (2 032 mm) of the box measured along the sheath, and where the sheath extends through a cable knockout not less than 1/4 inch (6.4 mm), securing the cable to the box shall not be required. Multiple cable entries shall be permitted in a single cable knockout opening. [314.17(c) Exception amended]E3908.9. Equipment fastened in place or connected by permanent wiring methods. Noncurrent-carrying metal parts of equipment, raceways, and other enclosures, where required to be grounded, shall be grounded by 1 of the following methods: [250.134] (a) By any of the equipment grounding conductors permitted by Sections E3908.8 and E3908.8.3. [250.134(A)](b) By an equipment grounding conductor contained within the same raceway, cable, or cord, or otherwise run with the circuit conductors. Equipment grounding conductors shall be identified in accordance with Section E3407.2. [250.134(B) Exception] E3908.9.1. Cord-and-plug-connected equipment. Non-current-carrying metal parts of the cord-and-plug-connected equipment, if grounded, shall be connected to an equipment grounding conductor by 1 of the methods in E3908.9.1.1 and E3908.9.1.2. [250.138] E3908.9.1.1. By means of an equipment grounding conductor. By means of an equipment grounding conductor run with the power supply conductors in a cable assembly or flexible cord properly terminated in a grounding-type attachment plug with 1 fixed grounding contact. [250.138(A)] Exception: The grounding contacting pole of grounding-type plug-in ground-fault circuit interrupters may be of the movable, self-restoring type on circuits operating at not over 150 volts between any 2 conductors or over 150 volts between any conductor and ground. [250.138(A) Exception]
E3908.9.1.2. By means of a separate flexible wire or strap. By means of a separate flexible wire or strap, insulated or bare, connected to an equipment grounding conductor, and protected as well as practicable against physical damage, where part of the equipment. [250.138(B)]E3908.10. Methods of equipment grounding. Fixtures and equipment shall be considered grounded where mechanically connected to an equipment grounding conductor as specified in Sections E3908.8 and E3908.8.3. Wire type equipment grounding conductors shall be sized in accordance with Section E3908.12.Mich. Admin. Code R. 408.30537b