Pool Motors need overload?

[mhulbert]

I came across an existing situation, a typical home pool with a 3 HP, 1.5 Hp, and 1 Hp pump, single phase, 240 V. Service factor marked as 1.15, max 40 deg rise. Power goes from a 20A, 2p breaker (30A for the 3 HP) into a relay cabinet used by the pool control system, and then directly to motors. No heaters in between. Is this OK?

I don't know if the motor has an internal thermal overload...how would I know if it did? Also, am I correct in assuming that I follow table 430.52 to size the breaker that feeds the motor

 

[hurk27]

Re: Pool Motors need overload?

It should say on the motor label as to "internaly protected". or something like "internal thermal protection" Most motors that are 1? 5hp or less will have this built in.

 

[guesseral]

Re: Pool Motors need overload?

If the motor isn't internally protected couldn't you just use fuses @ 1.25% for each motors? Maybe they are in the relay cabinet. But unless the motors are very old they should be protected look for the tag on the motor.