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#170157 - 10/28/07 11:20 AM Cat 5 current carrying capacity
lyledunn Offline
Member

Registered: 06/30/02
Posts: 159
Loc: N.Ireland
I installed a cat 5 cable as part of a proposed dimming system in my newly refubed kitchen. Problem is that I cant afford dimmer pack at the moment. Missus D is not making tea any more! I though I might stick a few relays in a box in the meantime and control them using the cat 5. Cant find any info on net on current carrying capacity probably because they were not designed to carry current per se.
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#170173 - 10/29/07 04:45 AM Re: Cat 5 current carrying capacity [Re: lyledunn]
Texas_Ranger Offline
Member

Registered: 12/17/01
Posts: 2331
Loc: Vienna, Austria
isn't cat 5 22AWG?

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#170178 - 10/29/07 05:36 AM Re: Cat 5 current carrying capacity [Re: Texas_Ranger]
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
24 AWG -- Certainly adequate for the sort of relay coil currents you'd need in this application (i.e. < 250mA). It will have to be low-voltage switching, as CAT5 isn't rated for 240V.

I have to ask: Why CAT5 for a proposed dimmer system? Did you just happen to have some spare?

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#170271 - 10/30/07 03:06 PM Re: Cat 5 current carrying capacity [Re: pauluk]
lyledunn Offline
Member

Registered: 06/30/02
Posts: 159
Loc: N.Ireland
Paul,
It is a Hamilton-Litestat dimmer pack and they stipulate the wiring system. I guess CAT 5 is very available and adequate for remote control.
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lyle dunn

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#170281 - 10/30/07 06:45 PM Re: Cat 5 current carrying capacity [Re: lyledunn]
wacked Offline
Member

Registered: 12/19/06
Posts: 33
Seems weird that they would specify Cat 5

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#170291 - 10/30/07 07:47 PM Re: Cat 5 current carrying capacity [Re: wacked]
Trumpy Offline

Member

Registered: 07/05/02
Posts: 8530
Loc: SI,New Zealand
A lot of the Clipsal C-Bus stuff here uses Cat-5e for it's wiring.
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#170313 - 10/31/07 09:30 AM Re: Cat 5 current carrying capacity [Re: Trumpy]
EV607797 Offline
Member

Registered: 10/25/06
Posts: 756
Loc: Fredericksburg, VA, USA
CAT5 is definitely overkill, but widely-available. I am sure that's the primary reason. Unless there's a very unusual need, all telephone/data wiring is 24 gauge. The exception is CAT6, which is 23 gauge.

22 gauge was the norm for surface wiring that was run around baseboards to make it more resilient to damage during installation.

Regardless, it's more than enough to handle the small control circuit loads as Paul mentioned.
_________________________
---Ed---

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#170354 - 11/01/07 10:24 AM Re: Cat 5 current carrying capacity [Re: EV607797]
pauluk Offline
Member

Registered: 08/11/01
Posts: 7693
Loc: Norfolk, England
Overkill without a doubt -- As Ed says, I guess they just figure it's widely available now and a lot of people will know what it is.

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