Contactor Type
Contactor Type
(OP)
Folks,
I am using a 40A motor contactor to energize a circuit with the following components:
4 motors each rated for 208V, ¾ HP, 5.2 FLA (manufacturer’s info)
1 motor rated for 208 V, 1/3 HP, 2.3 FLA (manufacturer’s info)
and a total of 14 A non-motor load (mini-fan, ballast, horn, indicating lights, ...)
Isn’t it a misapplication to use a motor contactor to energize non-motor loads? I am using a Square D contactor SC02 type. Many thanks for your comments, -Mort
I am using a 40A motor contactor to energize a circuit with the following components:
4 motors each rated for 208V, ¾ HP, 5.2 FLA (manufacturer’s info)
1 motor rated for 208 V, 1/3 HP, 2.3 FLA (manufacturer’s info)
and a total of 14 A non-motor load (mini-fan, ballast, horn, indicating lights, ...)
Isn’t it a misapplication to use a motor contactor to energize non-motor loads? I am using a Square D contactor SC02 type. Many thanks for your comments, -Mort





RE: Contactor Type
Otherwise, it's OK to use a motor contactor for the loads you indicate. Motors are, generally speaking, a "difficult" load to start due to their inductive nature, compared to other resistive loads such as lights, heaters, etc. You can use a motor contactor to control resistive loads, but you cannot use a general purpose contactor to start a motor, at least not without proper derating.
Make sure you have provided overload and short circuit protection for all loads per code requirements. And double check the rating of your contactor as I mentioned above.
RE: Contactor Type
RE: Contactor Type