| Re: Coach Batt Power Feed [message #264116 is a reply to message #264077] |
Mon, 13 October 2014 08:08   |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma:
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Senior Member |
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Ken Burton wrote on Sun, 12 October 2014 22:43If you have TWO house battery banks, (and one engine battery) why not just combine the house batteries with a combiner and be done with it.
I guess I do not understand what it trying to be accomplished.
Ken,
Many insurance carriers were requiring a master battery disconnect.
That was, until, they discovered that installed as required, it also disconnected any automatic bilge pump.
(Fall back and punt.) So, they revised the rules to nobody's benefit.
Also, at that time, most boats did not have a house and an engine battery.
Some had two batteries, and to share the load these switches were installed.
These people were slow to adopt diode isolators and combiners.
As said, many of these switches were break-before-make and switching the wrong way with the engine running could take out your alternator's bridge fast.
Actually, I thought all of this was kind of neat. It allowed me to make a reasonable living bringing cruising boat electrics up to the level that our coaches were in the 70's. But then, if you knew the technology level (more accurately, the lack thereof) of most pleasure boat builders, you would be astounded - even today....
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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