ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Increasing demand factors in residential
by gfretwell - 03/28/24 12:43 AM
Portable generator question
by Steve Miller - 03/19/24 08:50 PM
Do we need grounding?
by NORCAL - 03/19/24 05:11 PM
240V only in a home and NEC?
by dsk - 03/19/24 06:33 AM
Cordless Tools: The Obvious Question
by renosteinke - 03/14/24 08:05 PM
New in the Gallery:
This is a new one
This is a new one
by timmp, September 24
Few pics I found
Few pics I found
by timmp, August 15
Who's Online Now
0 members (), 263 guests, and 17 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Dec 2001
Posts: 444
S
Sandro Offline OP
Member
We are doing work at a factory here with all DC motors for the conveyor systems. The gentleman wants each of the 7 DC motors to have disconnects at the motor (3/4 hp DC motors).

No switch in the Leviton book is rated for DC. Is it permissible to use AC motor control switches for DC? Nothing on the Leviton website or in their product catalog says anything about DC switches.

Switch in question is the Manual Motor Start toggle switch.(Leviton MS402)

Cat. # General Purpose Rating Max. H.P. Rating Description
30AMP AC Manual Motor Starting Switches
MS302 30 AMP 600 V AC 2HP 120 V AC
5HP 240 V AC
10HP 480 V AC
15HP 600 V AC Double-pole, single-throw, AC manual motor starting switch, without overload protection

Joined: Jan 2003
Posts: 134
L
Member
Sandro...square d has what i think your looking for.just check your grainger catalog or go to there web site.the one i see in the book is 3/4 hp,2pole,110-230 volts

Joined: Dec 2002
Posts: 16
A
Member
Dear Sandro,
You know as per IEC standards AC-22 duty is for switching resitive and inductive loads .Now in DC we don't have inductance hence AC-21 duty switches should work.Check out websites of SOCOMEC,MEM,CUTLER HAMMER.


Link Copied to Clipboard
Powered by UBB.threads™ PHP Forum Software 7.7.5