[Mike Betts]

Originally Posted by Paul Copioli

You can use a 40, 30, or 20 amp breaker for the van door motor (or Fisher-Price, or CIM). The breaker is meant to protect so as long as the breaker is BELOW the stall current, you are legal per the rules...

Paul,

Your advise, while sound engineering design policy, does not accurately reflect the rules.

<R47> defines CB size based on wire size. Stall current is mot mentioned in the rules and is irrelevant. According to the rules, you can select a motor with very large stall currents (example: a CIM), wire it with 18 AWG wire and protect the circuit with a 20A CB. It is legal. You will repeatedly trip the breaker under almost all conditions (making it practically useless) but it is legal.

Regards,

Mike