battery cut off relay

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 1:21 pm

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would this be suitable to put inline on the battery earth cable

Post by **AJL Electronics** » Sun Mar 03, 2019 1:36 pm

It probably would but why?

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 1:42 pm

Cheers...i reasoned that with a loom fire/short, by the time i stopped opened the bonnet and used a manual cut off it may be too late..With this its just flick a switch on the dash , couple of seconds at most

Post by **scimmy_man** » Sun Mar 03, 2019 2:26 pm

how much power would the starter draw?
probably more than 200 amp on a cold day.
would it weld the contacts closed?

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 2:49 pm

Reckon your right , found some 500 amp relays on ebay instead

Post by **scimmy_man** » Sun Mar 03, 2019 4:39 pm

safer

Post by **AJL Electronics** » Sun Mar 03, 2019 4:40 pm

With the contacts held closed, it isn't such an issue, the thing that kills solenoids is switching high currents. I think it overkill though, you would be better improving the fusing arrangements in my opinion. That will also keep the important feeds like the clock and radio memories.

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 5:31 pm

Cheers the old loom scares me i just want a quick cut off just in case..Sorry Terry i can't get pm's to reply but the ebay starter / cut offs are around £12

Post by **peter freeman** » Sun Mar 03, 2019 5:37 pm

You will still have some power around when the switch is off otherwise you will not be able to energise the relay - all be it wired just to the battery

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 5:45 pm

Thanks peter but it will only be one new wire from the battery through a switch to the relay operating coil everything else will be dead until i energise it

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 5:48 pm

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Think how long it would take if you were in the outside lane of a motorway to get on the hard shoulder get out open bonnet and use a normal battery cut off....car be full of lucas smoke by then

Post by **AJL Electronics** » Sun Mar 03, 2019 6:09 pm

rebel alliance wrote: ↑
Sun Mar 03, 2019 5:48 pm
Think how long it would take if you were in the outside lane of a motorway to get on the hard shoulder get out open bonnet and use a normal battery cut off....car be full of lucas smoke by then

Think how much easier it would be if the loom was saved by the simple addition of a few fuses.

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 6:11 pm

Your probably right but i would not know where to start

Post by **willholderogri** » Sun Mar 03, 2019 6:12 pm

Its a good idea but it needs to be in the live feed

rebel alliance · Post by **rebel alliance** » Sun Mar 03, 2019 6:19 pm

Think the negative is easier ,stick the relay out the way ..i would not think it made any difference as long as the main battery power was cut ?