225.30 Number of Supplies.
A building or other structure that is served by a branch circuit or feeder on the load side of a service disconnecting means shall be supplied by only one feeder or branch circuit unless permitted in
225.30(A) through (F). For the purpose of this section, a multiwire branch circuit shall be considered a single circuit.
Where a branch circuit or feeder originates in these additional buildings or other structures, only one feeder or branch circuit shall be permitted to supply power back to the original building or structure, unless permitted in
225.30(A) through (F).
(A) Special Conditions.
Additional feeders or branch circuits shall be permitted to supply the following:
- (1)
Fire pumps
- (2)
Emergency systems
- (3)
Legally required standby systems
- (4)
Optional standby systems
- (5)
Parallel power production systems
- (6)
Systems designed for connection to multiple sources of supply for the purpose of enhanced reliability
- (7)
Electric vehicle charging systems listed, labeled, and identified for more than a single branch circuit or feeder
- (8)
Docking facilities and piers