Q.When grounding branch circuits – with respect to grounding requirements for receptacles and fixed equipment – in patient care areas of hospitals (critical care or general care areas), which of the following statements is correct?
A) You can use an internal equipment grounding conductor of a metallic raceway or cable, the metal of the metallic raceway, or a metallic cable armor or sheath assembly to ground receptacles or fixed equipment.
B) You can only use a properly sized internal equipment grounding conductor within a metallic raceway.
C) You can only use a properly sized internal equipment grounding conductor in a nonmetallic raceway.
D) You can use any properly sized equipment bonding jumper installed external to the wiring method of choice.
Explanation: Section 517.13 of the 2005 NEC was revised to allow you to use the metal of the metallic raceway, or a metallic cable armor or sheath assembly of a cable or cable assembly, to ground receptacles and fixed equipment in patient care areas. Grounding by use of an internal equipment-grounding conductor within the raceway or cable is now just one method permitted by the NEC.
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