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

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: 308
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
#33664 - 01/27/04 08:44 AM Re: CAT 5 voltage rating?
C-H Offline
Member
Registered: 09/17/02
Posts: 1497
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: 886
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: 507
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: 886
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: 308
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: 119
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: 308
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: 119
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 >

Member Spotlight
Member Since: 07/05/02
Posts: 8211
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 55 Guests and 10 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
Scotto, Freecrowder, clee512, Jdscott2005, FAIZAN

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