I'd been visualizing it differently. Not that the longer wire would cause voltage drop, but that to maintain voltage over the longer distance would be thicker, harder to work with, and more expensive.
I think it helps to mention that control wires for the remote battery switch should be of the fire resistent type preferable with its own emergency power supply. No use for a remote battery switch when the thin control wiring is melted.
I had installed a couple of remote battery switches in 2021. They are really great. Jeff, noticed there is a delay, once remotes are turned Off, to actual powering down of MFDs, radio, etc. Why ?
Are you talking secs or minutes? If the delay is mins it might be an ACR staying on and cross feeding power between banks / loads. Power is not lost untill the ACR shuts off. This happens if ACRs are wired to the load side of a battery switch and not wired to the battery side of the switch. If it's just secs. It could be because most electronics store power in capacitors and sometimes take a couple secs to drain themselves when power is shut off to them. I would recommend shutting electronics down by their own buttons before turning the battery switch off.
Thanks for the detailed reply. Sometimes 2-3 minutes if loads are light. There are several ACRs on an Axopar 28. Your insight is likely correct, that they are cross feeding each other. I am careful not to start wiring, until all is discharged.
I have the Blue Sea systems add a battery ACR, how would I add this to the system? Would I need one for each battery? Is there a version that is compatible with the 2 battery ACR?
You would need one for each battery bank. The ACR doesn't care what switches are being used. But it should be connected before the switches on the battery side of the switch.
The remote switches are just relays / solenoids. However for example the blue sea ml is rated for 1400 amps cranking and 500a continuous. You are not going to find that in a normal relay. They are also latching so they do not consume power when on, only when switching. Where as most relays / solenoids will constantly consume power when on. They also have a physical manual override in case the control system fails or breaks. I'm sure you could find an industrial relay that could work if you looked, But we generally stick to using marine products.
