ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Questioning the electrical norms
by HotLine1 - 03/04/21 12:35 PM
Lock-down Thread
by gfretwell - 03/03/21 12:38 PM
Northern Tool Recalls Powerhorse Generators
by Admin - 02/25/21 09:49 PM
You will never guess
by gfretwell - 02/25/21 07:48 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 20 guests, and 18 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Low Voltage Contactor #165131 06/19/07 11:54 AM
Joined: May 2005
Posts: 706
T
Tiger Offline OP
Member
I need a contactor for a special doorbell chime. The chime is 120-volt and the coil on the contactor can be 16 or 24 volt. Anyone know a manufacturer?

Thanks,
Dave

Work Gear for Electricians and the Trades
Re: Low Voltage Contactor [Re: Tiger] #165133 06/19/07 12:18 PM
Joined: Jun 2007
Posts: 301
J
JValdes Offline
Member
Yes. Check www.wegelectric.com. Click on E-Catolog. Search part number CW07L310G. Around $25.00.

You can find what you need very easily anywhere. Contactors with 24 VAC coils and contacts for the required current. You can try your local supplier.

Re: Low Voltage Contactor [Re: JValdes] #165138 06/19/07 07:05 PM
Joined: Dec 2002
Posts: 228
J
JCooper Offline
Member
SquareD makes such an animal and a nice little box for it, I used a 30 amp contactor driven with 24VAC. I think the enclosure was more than the contactor, and I got it from Grainger.

Does it have to be a contactor? Can use use a normal cube relay? Most have 10 amp contacts and can be found for 12 or 24 vac/vdc

Last edited by JCooper; 06/19/07 07:08 PM.
Re: Low Voltage Contactor [Re: Tiger] #165139 06/19/07 08:26 PM
Joined: Sep 2005
Posts: 421
togol Offline
Member
Dave, here is a 12A 8pin http://web4.automationdirect.com/ad...ectro-Mechanical_Octal_Relays/750-2C-24A it even has a test button and LED indicator along with a base it's about 10 bucks


Tom
Re: Low Voltage Contactor [Re: togol] #165140 06/19/07 09:40 PM
Joined: May 2005
Posts: 706
T
Tiger Offline OP
Member
Thanks everyone. I did a Google search and found that 24V contactors are used in air conditioners. I called my supplier again and he found one for me. He also asked about a relay, but I'm not very familiar with relays.

Dave

Re: Low Voltage Contactor [Re: Tiger] #165143 06/19/07 10:53 PM
Joined: Mar 2004
Posts: 251
W
WESTUPLACE Offline
Member
AC contractors call the contactors with a 24v transformers "fan centers" I ofen use them to control special circuits which require low voltage control. Relays are 12 amp or better. They mount on a 1900 box and seperate low from high. Robert

Re: Low Voltage Contactor [Re: Tiger] #165157 06/20/07 08:52 PM
Joined: Jan 2005
Posts: 155
D
Dave T Offline
Member
Just a suggestion.
Your LV source may not have enough va to energize a LV contactor coil. I would suggest that you incorporate an interposing relay of which its coil, 24vac for example, will function easily with your LV source. When it is energized it would close a contact that would energize the 120v coil which controls the chime.
Also, you wouldn't be plagued with a voltage drop between the bell transformer and a contactor with a LV coil. The coil of a small interposing relay would draw very little current and be controled by a conventional door bell switch. Otherwise, a convertional doorbell switch may not be able to handle the LV current required to pull in and hold a common contactor.
I believe there would be a much less trouble using an interposing relay.
This is intended to think outside the box a bit.

Re: Low Voltage Contactor [Re: Dave T] #165161 06/20/07 10:00 PM
Joined: Jul 2004
Posts: 9,571
G
gfretwell Offline
Member
You can get some little ice cube relays that handle 5a at 120 and some small metal can relays will do 20a @ 250. What kind of "chime" is this that needs a contactor?

Again I am thinking SSR ;-)


Greg Fretwell
Re: Low Voltage Contactor [Re: gfretwell] #165199 06/22/07 12:48 PM
Joined: Jun 2007
Posts: 301
J
JValdes Offline
Member
Dave T, Perfect suggestion.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
NickD
NickD
Amish Country, PA
Posts: 46
Joined: March 2013
Show All Member Profiles 
Top Posters(30 Days)
Popular Topics(Views)
275,655 Are you busy
209,581 Re: Forum
196,935 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3