A. batteries
B. key feeder
C Switching rquipment
D. Demarc box
Answers:
C Switching equipment
A. battery are within a separately ventilate room because it is possible to generate explosive hydrogen gas from charging.
B. fundamental feeder comes into the CO but is afterwards spread out to the miscellaneous switching equipment in ALL the relay racks.
C. Switching equipment is housed in relay racks.
D. Demarc box (demarcation box) is located on the customer's premises to denote where on earth the delivery service's flex service responsibility begins/ends.