Full Beams wiring thickness ?

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Full Beams wiring thickness ?

Postby Tuga2112 » Wed 30.05.2018, 13:06

does anyone know the specs for the wiring for the full beam lamps ?

I have replaced mine with white (not yellow) lamps. but the new ones are 100w instead of 60. I have changed the fuses to 10amp instead of the original 7.5. and tested it for a minute.
The wires didnt warm up so i left things as they are, i suspect the tolerances for wiring to allow me to run higher amperage there, but if anyone knows the specs of those wires i could google around a bit and confirm theres no danger in long term.

i barely ever use my full beams, and when i do its usually for relatively short periods during the night. both these factors together should mitigate (if) any increased heat in the wires.
1991 elan se
1991 elan se project
91 MR2 Turbo (import) project
94 Celica GT4 (Import)
94 4Runner
98 Celica SR

too many projects. not enough sunny days :(
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Re: Full Beams wiring thickness ?

Postby Saltire » Wed 30.05.2018, 13:53

Joao

Assuming the cables are the OEM ones, and nobody’s rewired: the ISO6722 standard gives 16.5 amp capacity for a cable of cross-section 1.0mm, which I believe these are (I don’t have the car to hand). That should give you ample current capacity for a 100w bulb (100 watt divided by 12 volts = 8.3 amps).

See this helpful page for chapter and verse.
Jonathan

S2 no 512, BRG, magnolia interior, last of four UK S2 to this spec
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Re: Full Beams wiring thickness ?

Postby Tuga2112 » Thu 31.05.2018, 22:38

Saltire wrote:Joao

Assuming the cables are the OEM ones, and nobody’s rewired: the ISO6722 standard gives 16.5 amp capacity for a cable of cross-section 1.0mm, which I believe these are (I don’t have the car to hand). That should give you ample current capacity for a 100w bulb (100 watt divided by 12 volts = 8.3 amps).

See this helpful page for chapter and verse.


Thanks Jonathan, this leaves me more confurtable my brighter full beams are safe :)
1991 elan se
1991 elan se project
91 MR2 Turbo (import) project
94 Celica GT4 (Import)
94 4Runner
98 Celica SR

too many projects. not enough sunny days :(
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Tuga2112
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Posts: 1105
Joined: Fri 12.09.2014, 22:54
Location: Walsall


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