Overload relay Q

[GlennH]

If I have a 208 single phase motor that needs an overload relay, Can I just protect 1 line or do I have to protect both?

 

[jumper]

If I am reading T430.27 for a relay, only one conductor.

 

[dkidd]

If I am reading T430.27 for a relay, only one conductor.

That would be T430.37. 2014

 

[jumper]

That would be T430.37. 2014

Yep. Thanks.

 

[just the cowboy]

What horse power

What horse power

For 1 HP or less these work great.
FRACTIONAL HORSEPOWER MANUAL STARTERS
WITH MELTING ALLOY TYPE THERMAL OVERLOAD RELAY

http://static.schneider-electric.us/docs/Motor Control/Manual Starters and Switches/2510CT9701.pdf

 

[kwired]

For any two wire supplied motor you only need overload sensing device in one of the supply lines. What goes in one conductor must go out the other as long as there is no ground faults within the motor.

 

[GoldDigger]

For any two wire supplied motor you only need overload sensing device in one of the supply lines. What goes in one conductor must go out the other as long as there is no ground faults within the motor.

And hopefully a ground fault in the motor would trip a breaker rather than needing the overload to catch it.

Sent from my XT1585 using Tapatalk

 

[templdl]

Please confirm that the single phase motor doesn't already have an integral thermal protection.