EC15B starts well but stalls after 10 seconds

[v8druid]

RE4 is the second one from left. The wires from the relays were loose because the connector was loose.

New 300A main switch, installed it today.

pic is upsidedown... sorry

Battery isolater switch is usually in the negative side of the circuit .... I doubt that will pass 300 A in the live +ve side of things

[Muz]

Never seen an Isolator in there .. even with my head upside down good job you got it sorted Mattir ..and thanks for your posting and research work.. and your time and effort .. which will help loads of other people good job

[Mattir]

Led

Battery isolater switch is usually in the negative side of the circuit .... I doubt that will pass 300 A in the live +ve side of things

300A intermittantly is no issue for that switch. Actually it will need to pass only 150A starter current.

Installed it for convenience reasons to switch on / off power without crawling in to the battery compartment.

[v8druid]

Led

300A intermittantly is no issue for that switch. Actually it will need to pass only 150A starter current.

Installed it for convenience reasons to switch on / off power without crawling in to the battery compartment.

so is the switch a dedicated +ve isolator then Mattir ...... as I say ... most isolators are designed to disconnect the negative side of the circuit and although rated at those sorts of levels, rarely see anything like that level of draw at the -ve side of the circuits.

I can understand why you've put it in though

[Mattir]

so is the switch a dedicated +ve isolator then Mattir ...... as I say ... most isolators are designed to disconnect the negative side of the circuit and although rated at those sorts of levels, rarely see anything like that level of draw at the -ve side of the circuits.

I can understand why you've put it in though

Interesting topic. Hard to imagine where does the idea of having an isolator switch either in the positive or negative come from. It is all the same. The voltage over and current through the switch are the same in both cases. There will be a similar transition overvoltage phenomena if the switch is opened while current flowing through it. Safetywise there is no real difference. All that matters is the switch rating and mechanical strength. Another very important thing is the protection of the wires against abrasion caused by vibration. If that is done carelessly, sooner or later it will burn the doug due to a short circuit. And that will be very hard to extinguish as electrical fires burn as long there is electricity.