Rule R621
R621 *Protect circuits with appropriate circuit breakers.
Each branch circuit must be protected by 1 and only 1 circuit breaker or fuse
on the PD per Table 8‑3. No other electrical load can be
connected to the breaker or fuse supplying this circuit with the exception of
devices downstream of a permitted motor power adapter board placed between the
PD and a motor controller (WCP-1380, WCP-1903, WCP-1904, RF-4003, RF-4004, RF-4005).