| Re: [GMCnet] IOTA 50A Transfer Switches [message #324801 is a reply to message #324775] |
Tue, 10 October 2017 17:30   |
habbyguy
Messages: 896
Registered: May 2012
Location: Mesa, AZ
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Senior Member |
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Here's a quickie chart I put together to show the amount of voltage loss in a theoretical 25' length of cable. It's easy to see that fatter cable is a good investment, because inverters are notoriously finicky about the input voltage - I know my 1000 watt (continuous) inverter will happily crank out 7 amps of 120VAC now that it's fed with 2/0 and 1/0 cable (along with the original run of #4 in parallel). Before I put in the monster cable, the microwave (original) or my little 7 amp vacuum would trip the protection circuit in the inverter. Now it just dims the lights in the coach when 100+ amps comes streaming out of the house batteries. 
The amp columns on the right show the disparity in load between two batteries located in different parts of the coach (separated by 25' of cable). As you can see, even with "too small cable", the load isn't all that far from balanced - which is kind of against the theory that one battery will melt into a lump while the other one doesn't get a workout.
Mark Hickey
Mesa, AZ
1978 Royale Center Kitchen
[Updated on: Tue, 10 October 2017 17:33] Report message to a moderator |
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