Quote:
Originally Posted by macafee2
spoke to towsure as they recommend fusing the relay and thus trailer lights at 15 amp.
Their argument was no-one will sit there with all the lights on that I mention. Probably unlikely but it could happen.
The relay is years old and has probably sold in it's millions so why am I querying the fuse rating?
macafee2
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Yes the calculated figure is a peak figure - but isn't far off if you reverse at night with the indicator on - what's missing? - one indicator? By all means fuse at 15A and you'll likely be fine but make sure the cable is capable of handling more than the fuse - a 15A fuse should probably be cabled for 20A minimum. All the other calculation re: voltage drop and cable power loss still stand.