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Unread 02-06-2011, 03:42 PM   #11
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Default Re: Grounding Toggle Switches

In aviation the rules are slightly different because of the consequences of failure and the inability to just pull over and stop.
To put it the electrical system of a cart in perspective, give this some thought:
1) With your headlights, tail lights and stereo on the power draw is about 240 watts which is 10 amps at 12v and conversely 2.5 amps at 48v.
2) Your motor draws in the neighborhood of 300 amps at start up and 80 amps at cruise.
3) Eliminating an extremely small draw will do nothing other than to make someone feel better about conserving battery power.
4) These are just my opinions and I believe in the KISS method, anything not required is just another opportunity for an electrical failure.
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Unread 02-06-2011, 06:24 PM   #12
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Default Re: Grounding Toggle Switches

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Originally Posted by dougmcp View Post
In aviation the rules are slightly different because of the consequences of failure and the inability to just pull over and stop.
To put it the electrical system of a cart in perspective, give this some thought:
1) With your headlights, tail lights and stereo on the power draw is about 240 watts which is 10 amps at 12v and conversely 2.5 amps at 48v.
2) Your motor draws in the neighborhood of 300 amps at start up and 80 amps at cruise.
3) Eliminating an extremely small draw will do nothing other than to make someone feel better about conserving battery power.
4) These are just my opinions and I believe in the KISS method, anything not required is just another opportunity for an electrical failure.
We old time pilots like switches and gauges for everything. It was a hard transition for me to go to an all glass (digital) cockpit a few years back. Like my wife said the other day " I better think about driving that cart and not flying it". I'll consider your recommendations Doug.
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Unread 02-06-2011, 06:39 PM   #13
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Default Re: Grounding Toggle Switches

I like switches and gauges for everything as well but I have a flybridge cruiser with twins so I have lots of those already and have taken the minimalist approach to my cart. Good luck with your project.
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Unread 02-06-2011, 06:43 PM   #14
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Default Re: Grounding Toggle Switches

Question for you CR.... Just wondering if you considered a seperate 12v system for the accessories or if you were sold on the voltafge reducer right from the start?

No right or wrong way as I understand it, just wondering what the thought process was in using the reducer vs a seperate 12v battery.

t
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Unread 02-06-2011, 09:00 PM   #15
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Default Re: Grounding Toggle Switches

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Question for you CR.... Just wondering if you considered a seperate 12v system for the accessories or if you were sold on the voltafge reducer right from the start?

No right or wrong way as I understand it, just wondering what the thought process was in using the reducer vs a seperate 12v battery.

t
Terry, I don't know. Didn't want the extra weight? Didn't want to deal with a second charger? The Reducer drawing from the 48v sounded easy to me, and the "Godfather" recommended it for my situation.
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Unread 02-06-2011, 10:49 PM   #16
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Default Re: Grounding Toggle Switches

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Terry, I don't know. Didn't want the extra weight? Didn't want to deal with a second charger? The Reducer drawing from the 48v sounded easy to me, and the "Godfather" recommended it for my situation.
Works for me. Certainly nothing wrong with taking Scotty's advice!! I can see advantages to both. The seperate 12v system made logical sense to me but what do I know. .

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Unread 02-06-2011, 11:19 PM   #17
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Default Re: Grounding Toggle Switches

Well arent you running a voltage reducer? If so run it off a solenoid connected to the key switch. When you turn off the cart all ACC's will also be turned off just like a car.
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Unread 02-07-2011, 09:52 AM   #18
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Default Re: Grounding Toggle Switches

This is a healthy discussion for me. Thanks to all.

So if I power up the voltage reducer through the solenoid, and turn on the key switch, everything comes to life....well, that makes sence to me.... and when I'm out in the woods at the deer camp and something goes wacko with the reducer or beyond, just turn off the key switch... Then what?
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Unread 02-07-2011, 10:20 AM   #19
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Default Re: Grounding Toggle Switches

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and when I'm out in the woods at the deer camp and something goes wacko with the reducer or beyond, just turn off the key switch... Then what?
Unless your definition of wacko is different, there is nothing I can think of that can cause any problem other than failure to supply power to your accessories. Any failures will fail "Safe".
A DC to DC voltage reducer is generally a transformer and an assortment of resistors and diodes designed to deliver X amperage.
  • If it oversupplies amperage and has no regulator or shorts out the fuse will blow.
  • If the fuse is too large for the reducer you will let the magic smoke out of it.
  • If the relay doesn't work you will have no accessories.
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Unread 02-07-2011, 10:36 AM   #20
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Default Re: Grounding Toggle Switches

Dang Doug, You got me cornered up here. So trash the switch...Maybe I'll install it on the downstream of the power reducer.
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