 how many amps can I put on a relay, anyone know the max ratings? |
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| wndsnd |
 Apr 15 2013, 08:12 PM
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You wanted a horse, but got a goat. Nobody wants a goat....  Group: Members Posts: 2,861 Joined: 12-February 12 From: North Shore, MA Member No.: 14,124 Region Association: North East States   |
I came up with two sets of driving lights. One set is 100 watts and the other 150 watts.
The 150 watt will draw 12.5 amps. I would fuse this as a resistive load at 2-1 0r a 25 amp fuse. Will my existi g wiring and relay handle this? Worrying about wirin g capacity. Dont want to burn the insulation off the wire. |
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Replies(1 - 3)
| r_towle |
Apr 15 2013, 08:17 PM
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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doubt it.
Most of the wiring is rated for 8, 15, or rarely 20 amps. when I did my 911, I ran all new power to the relay and lights... Put a relay out front (Pelican sells a simple kit) and run new power from the fuse box input side to the relay up near the headlights...simple. Rich |
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| Mike Bellis |
Apr 15 2013, 08:32 PM
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Resident Electrician Group: Members Posts: 8,345 Joined: 22-June 09 From: Midlothian TX Member No.: 10,496 Region Association: None
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QUOTE(r_towle @ Apr 15 2013, 07:17 PM)  doubt it. Most of the wiring is rated for 8, 15, or rarely 20 amps. when I did my 911, I ran all new power to the relay and lights... Put a relay out front (Pelican sells a simple kit) and run new power from the fuse box input side to the relay up near the headlights...simple. Rich (IMG:style_emoticons/default/agree.gif) You are asking 40 year old wire to run modern lights. The wiring is not rated for the amperage. It never was. All automobile manufacturers use wire barely big enough to run anything. Run a new wire and fuse from the battery with a new relay. Most Bosch style relays are rated for 30 amps. |
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| r_towle |
Apr 15 2013, 08:39 PM
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#4
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Custom Member Group: Members Posts: 24,585 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States
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you dont need to go all the way back to the battery, you can just sister up the new poer lead at the fuse panel input side red wire.
Shorter run....but put in a fuse etc. rich |
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