ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

ECN Shout Chat
Top Posters(30 Days)
Admin 16
Recent Posts
ESA Arc flash course
by TheShockDoctors. 03/24/17 10:15 AM
fuse rejectors
by HotLine1. 03/24/17 07:53 AM
Another Forum Update
by Admin. 03/22/17 03:04 PM
Dining room plugs
by watersparkfalls. 03/21/17 10:31 PM
TRUE POWER
by jraef. 03/21/17 09:13 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
231,416 Are you busy
166,135 Re: Forum
160,592 Need opinion
Who's Online Now
0 registered members (), 48 guests, and 13 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#20954 - 01/24/03 08:26 PM AC disconnect switch for DC motor?  
Sandro  Offline
Member
Joined: Dec 2001
Posts: 444
Stoney Creek, ON, Canada
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


Work Gear for Electricians and the Trades

#20955 - 01/24/03 09:42 PM Re: AC disconnect switch for DC motor?  
lighthouse  Offline
Member
Joined: Jan 2003
Posts: 134
philadelphia pa 19125
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


#20956 - 01/25/03 04:54 AM Re: AC disconnect switch for DC motor?  
amandaamisha  Offline
Member
Joined: Dec 2002
Posts: 16
safat,kuwait,kuwait
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.



Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 14 (0.003s) Memory: 0.7495 MB (Peak: 0.8742 MB) Zlib enabled. Server Time: 2017-03-25 11:42:47 UTC