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satchmolips

Active Member

• Sunday at 16:24

• #1

Have a light bar, which will have 5 individual LEDs on it. Am fine with all the relay wiring etc. Any advice on waterproof connectors to join each individual light into Live and earth wire? Five lights at 20 Amp watts each means a min 9 amp wire? Would I need to run an earth back into engine bay or could I rely on earthing it to light bar which will be clamped to vehicle roof?

 

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Anaconda

Well-Known Member

• Sunday at 17:48

• #2

I found earthing to a roof rack doesn't work very well.

 

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lynall

Well-Known Member

Full Member

• Sunday at 18:26

• #3

The read/blue/yellow heatshrink crimp connector are pretty good at resisting water so long as you melt them fully.
Always earth back to the battery negative.

 

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Anaconda

Well-Known Member

• Sunday at 19:48

• #4

If the lamp draws 20amps then a wire that can take 9amps may well be too small, do you think

 

kermit_rr

Very

Full Member

• Sunday at 20:21

• #5

Anaconda said:

If the lamp draws 20amps then a wire that can take 9amps may well be too small, do you think

Click to expand...

I think he means 100w.. not amp watts
So yes 9A cable might be ok but it's go with 15A to minimise any voltage drop over however long the cable needs to be

 

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satchmolips

Active Member

• Monday at 08:04

• #6

kermit_rr said:

I think he means 100w.. not amp watts
So yes 9A cable might be ok but it's go with 15A to minimise any voltage drop over however long the cable needs to be

Click to expand...

Sorry yes Watts!

 

dag019

Well-Known Member

• Monday at 14:16

• #7

I used econoseal connectors on my roof lights onto twin core cable so they are earthed in the battery box where my relays are mounted. You can buy econoseal and cheaper imitations on ebay. this means if I need to swap a light out it is just plug and play and if I need to take the roof off (as I did when I swapped the body) again it is plug and play with no cutting of wiring.

i chose ecoseal rather than the many other sealed connectors available as they are what land rover used on their wireing looms as standard for 300tdi and td5, so they match the rest of the lights.