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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/PDH per Table 9‑3. No other electrical load can be connected to the breaker or fuse supplying this circuit.

Table 9‑3 Branch circuit protection requirements

Branch Circuit

Circuit Breaker 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

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/PDH or any fuses or breakers within Custom Circuits for additional protection.

# contentMap.en
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/PDH per Table 9‑3. No other electrical load can be connected to the breaker or fuse supplying this circuit.

Table 9‑3 Branch circuit protection requirements

Branch Circuit

Circuit Breaker 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

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/PDH or any fuses or breakers within Custom Circuits for additional protection.