Mess Deck: General Section > Tugs and Towing

Relay Question

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CGAux26:
I don't understand why a relay is necessary at all.  I have built my boats with up to 25 A ESC's and just a main switch rated at least 25 A.  Somebody educate me, please. 

roycv:
Hi, I do not disagree, but this is being very careful, that is all.
regards Roy

Netleyned:
Could be just to facilitate the use
of a lower rated switch i.e
 smaller, which needs to be hidden in a deck
locker or suchlike.


Ned

JimG:
The relay keeps the 4.8V and 6V supplies seperate and switched from a single pole switch. An alternative would be to use a double pole switch with each supply on a seperate pole.

Jim

gman:
Still confused.  The 6v power supply goes to the fuse and to the relay. From there is where I confused. Why would the relay be necessary? The power to the switch is from the 4.8 v power supply, right? So I don't understand why the relay is being used?  I researched this vid ...


https://m.youtube.com/watch?v=UAeKTlieYhw


Thanks everyone on their feedback.

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