The Electrical Contractor Network

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

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Live Chat Feature
by Admin
Yesterday at 09:52 PM
Safety at heights?
by gfretwell
Yesterday at 07:16 PM
failed home inspection.
by gfretwell
Yesterday at 07:03 PM
Webmaster > Admin
by Admin
Yesterday at 05:49 PM
Old Bath Fan
by gfretwell
Yesterday at 01:38 AM
New in the Gallery:
Desk-mounted "power-board"
Top Posters (30 Days)
Admin 33
HotLine1 21
Ruben Rocha 16
gfretwell 15
Trumpy 13
Who's Online
0 registered (), 0 Guests and 174 Spiders online.
Key: Admin, Global Mod, Mod
Page 1 of 2 1 2 >
Topic Options
Rate This Topic
#33663 - 01/27/04 06:55 AM CAT 5 voltage rating?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
I would like to use CAT 5 cable for lowvoltage (24) volt control wiring.
I am planning to control 3Amp contact rating relays to operate window shutters. And am planning on using small N/O switches to control the relays.

Is the rating of the CAT 5 cable higher than 24 Volts?


Any other suggestions?


Edward
_________________________
Thanks
Edward

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#33664 - 01/27/04 08:44 AM Re: CAT 5 voltage rating?
C-H Offline


Member

Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
Check the cable. I had a look at some of the patchcords in the office: 300V (sic!)

The other rating I commonly find on computer cables is 30V. I think it would be technically impossible to manufacture a cable that could not handle this.

Top
#33665 - 01/27/04 02:47 PM Re: CAT 5 voltage rating?
hbiss Offline
Member

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
CAT5 as well as any of the other CAT cables are CL2 listed and as such are 150V. You will be fine.
_________________________
www.myphonetechs.com

Top
#33666 - 01/27/04 06:18 PM Re: CAT 5 voltage rating?
BrianSparky Offline
Member

Registered: 01/06/02
Posts: 38
Loc: Lakewood,CO
Just as a suggestion...
try using 18 gauge control wire.
phone wire is only about 22 gauge.

Top
#33667 - 01/27/04 06:42 PM Re: CAT 5 voltage rating?
golf junkie Offline
Member

Registered: 04/22/01
Posts: 511
Loc: York, NE
I second Brian's suggestion for 18awg. Volt drop becomes an issue very quickly when you are starting with low voltage.

GJ

Top
#33668 - 01/27/04 09:15 PM Re: CAT 5 voltage rating?
hbiss Offline
Member

Registered: 12/16/03
Posts: 893
Loc: Hawthorne, NY USA
That was my first thought also but after rereading the question I think I understood that the 24ga wire will operate the coils of the relays through the switches. Not much current there so voltage drop shouldn't be a problem. The 3A current rating is for the relay contacts, not the current through the control wire.
_________________________
www.myphonetechs.com

Top
#33669 - 01/27/04 10:46 PM Re: CAT 5 voltage rating?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
Thanks for the reply.

The contact rating is 3 amps.

The voltage problem should not be a problem. I just need to verify that using a CAT 5 cable is an acceptable method in this application which sounds like it is. And i am not violating NEC.

Edward
_________________________
Thanks
Edward

Top
#33670 - 01/28/04 08:18 PM Re: CAT 5 voltage rating?
ComputerWizKid Offline
Member

Registered: 09/20/03
Posts: 116
Loc: Connecticut, USA
Last time I checked 5 mins ago cat 5E is 26 Guage Might want to get 20 or 18 Guage wire
_________________________
Theres always enough room in the junction box.You just need a bigger hammer

Top
#33671 - 01/28/04 08:32 PM Re: CAT 5 voltage rating?
Edward Offline
Member

Registered: 12/14/02
Posts: 309
Loc: California
It is 24AWG. I think i will use thermostat wire 18AWG.

Edward
_________________________
Thanks
Edward

Top
#33672 - 01/28/04 08:52 PM Re: CAT 5 voltage rating?
ComputerWizKid Offline
Member

Registered: 09/20/03
Posts: 116
Loc: Connecticut, USA
The stuff I have is 26 AWG it came with my cable modem. but the newer stuff is 24 Guage
_________________________
Theres always enough room in the junction box.You just need a bigger hammer

Top
Page 1 of 2 1 2 >


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals