A portable or temporary alternate source _____ whenever the emergency generator for emergency systems is out of service for major maintenance or repair.
a) shall not be required
b) is recommended
c) shall be available
d) shall be avoided
See answer and applicable Code reference
The correct answer is: c) shall be available
Article 700 applies to the installation, operation and maintenance of emergency systems. As noted in the last sentence of Sec. 700.4(B), "A portable or temporary alternate source shall be available whenever the emergency generator is out of service for major maintenance or repair."