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 PDP/PDP2.0/PDH 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 Kraken X60 Powerpole adapter board (WCP-1380, RF-4003).

Table 8‑3 Branch circuit protection requirements

Branch Circuit	Circuit Breaker/Fuse Value	Quantity Allowed Per Breaker
Motor Controller	Up to 40A	1
CUSTOM CIRCUIT	Up to 40A	No limit
*Automation Direct Relay 40A (6M40)*	Up to 40A	1
Fans permitted per R501 and not already part of COTS computing devices.	Up to 20A	No limit
Spike Relay Module	Up to 20A	1
*Automation Direct Relay 25A (6M25)*	Up to 20A	1
PCM/PH – with compressor	Up to 20A	1
Servo Power Module/Servo Hub	Up to 20A	1
Additional VRM (non-radio)/Additional PCM/PH (non-compressor)	Up to 20A	3 total
*Automation Direct Relay 12A (6M12)*	Up to 10A	1

This rule does not prohibit the use of smaller value breakers in the PDP/PDP2.0/PDH or any fuses or breakers within CUSTOM CIRCUITS for additional protection.

Fans permitted per R501 may also be included within CUSTOM CIRCUITS.