pump motor

[topend]

I need to switch a pump motor (3ph 208v 9fla) on and off outside. I need this device off the shelf and 3R motor starters are expensive and need to be ordered. How important is it to install a device with overload heaters. Could I, in good conscience, install a simple 3 pole toggle switch?
Thanks.

 

[iwire]

How important is it to install a device with overload heaters.

Are fuses and breakers important?

Could I, in good conscience, install a simple 3 pole toggle switch?

I could not do that, there is a risk of fire and it is an NEC violation.

 

[topend]

pump motor

Are fuses and breakers important?



I could not do that, there is a risk of fire and it is an NEC violation.

Would a fusible safety switch be a solution?

 

[cpal]

check out 430.35 it mighthelp what Hp is the motor ???

 

[DAWGS]

Would a fusible safety switch be a solution?

Yea, along with a starter and it will be perfect.:wink:

 

[electricalperson]

if the motor has thermal protection then a motor rated switch would possibly work. the motor needs to have thermal protection either from heaters in a starter or built in

 

[Jraef]

If all you want to do is turn it on and off manually, use a simple Manual Motor Starter, they are a lot less expensive than magnetic starters.

Each motor circuit needs the following:

• Short Circuit Protective Device (fuses or breaker)
• Running Overload Protection ("heaters")
• Control / disconnect means (switch and/or contactor of some sort)
• Lock-out mechanism (for safety).

The location and configuration of each components is extremely variable, but in one form or another they all need to be there.

 

[topend]

pump motor

check out 430.35 it mighthelp what Hp is the motor ???

Sorry, 3hp.

 

[ptonsparky]

A 3R fused disconnect will control & protect the pump if you use the proper size fuses. This works well for motors that do not require a lot of starting current and are infrequently used or controlled. I try to limit this to motors below 5HP when doing AG work.