Work light and relay

This site contains affiliate links for which LandyZone may be compensated if you make a purchase.
L

luke-eol

New Member
Posts
2
Location
pembs west wales
okay i know this has probably had lots of different thread over the years, and i have tried looking, but what is the use of the relay in a circuit for a work light?

is it not feasible to take a live wire straight from the fuses to a switch and onto the light?

cheers for your help
 
luke-eol said:
okay i know this has probably had lots of different thread over the years, and i have tried looking, but what is the use of the relay in a circuit for a work light?

is it not feasible to take a live wire straight from the fuses to a switch and onto the light?

cheers for your help
Click to expand...

It helps stop your vehicle catching fire.

The relay means the load is taken off the switch and stops it melting/burning out.
 
As above - but it does depend on the specification of components. I've got a work light that has switch rated at 20 amps. The feed from the battery has a 10 amp fuse so I figure the switch is pretty safe :)
 
On my 90 ran a line through a switch to lamp from spare unused power source in center binical,it is used on export landys to supply the power socket and comes from ignition and so is switched,on home models power/fag lighter socket is permently live.
 
where in the circuit does the relay need to be? i assume from A-level electronics that it would come in after the switch to up the power

planning to use a 12v 55w spot
 
I used a carling switch which is rated to 10a so no need for a relay. most switches are only rated 1-3a hence the need for the relay.

A 4 pin relay with have 1 high and 1 low power curcuit. so big wire in from battery (with fuse) to relay. big wire out to lamp. 1 goes to switch the other earthed. A diagram would explain it better.

if you try to push all those amps through the switch it will melt and possibly catch fire. use a relay to switch the high current load.

G
 

Attachments

  • relay-diagram.jpg
    relay-diagram.jpg
    34.7 KB · Views: 1,040
luke-eol said:
where in the circuit does the relay need to be? i assume from A-level electronics that it would come in after the switch to up the power

planning to use a 12v 55w spot
Click to expand...

the relay does not boost the power. it is mearly a switching device. your switch tells it to let the juice in or not.

so the lamp will pull 4.58a

I used I think from memory a 5a fuse (maybe 7.5a?) and 10a wire. you could use a high rated switch or just a 10a or 20a relay.

HTH

G
 
I believe that's continuous. Although I can't find any definitive answer one way or the other - Carling's website simply says "20A 12-14VDC" which I think would be a little misleading if it's not continuous? Maybe I'm being naive.
As it is, I haven't got anything other than my worklight and my heated mirrors going straight through one of these switches - everything else is on relays anyway.
 
You must log in or register to reply here.

Similar threads

dave evans
Glowplugs
Replies
8
Views
567
Rougharse Racing
Rougharse Racing
tweedandbriar
Defender 110 Light Bar Wiring Question
Replies
19
Views
772
tweedandbriar
tweedandbriar
D
permanent live in engine bay for spotlights
Replies
10
Views
585
lynall
L
dag019
Roof light bar
Replies
0
Views
113
dag019
dag019
C
Defender TDCi Puma 90 - Diff Lock Light
Replies
12
Views
697
crashmat
C
Back
Top