12 volt negative bus

bev
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12 volt negative bus Jun 4, 2017 12:09:34 GMT -8 vikx likes this

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Post by bev on Jun 4, 2017 12:09:34 GMT -8

I've seen on numerous occasions that on the 12 volt side of the electrical system the (-) negatives of all the 12 v circuits tie together at a common point. i've seen some ppl use a simple angle bracket with a bolt, yes vix i'm talking about you

, or a bus with numerous lugs.

why don't these negative buses or metal brackets need to be insulated (i'm not talking about isolated) from the wood it is often screwed to? why isn't this a danger? is it that the voltage is so low that there is no risk for fire or arcing?

notice how this housing is made of plastic:
www.autozone.com/electrical-and-lighting/fuse-and-accessories/dorman-junction-box/297143_0_0

i don't have this on hand.

what i originally planned on using since it was already on hand, but now having second thoughts due to the above mentioned reason:
www.eslsupply.com/ge-industrial-tgl2-14-terminal-equipment-ground-kit/?CAWELAID=120164090000000945&CAGPSPN=pla&CAAGID=45741845931&CATCI=pla-66418499119&CATARGETID=120164090000045592&cadevice=c&gclid=CjwKEAjw387JBRDPtJePvOej8kASJADkV9TLs1flBRPW2THT-P5zt3yGXMs6kBG4FDiRVM56SuuBVhoC9Dvw_wcB

your feed back is appreciated.

RinTin Full Member Posts: 760 Likes: 292 Currently Offline	12 volt negative bus Jun 4, 2017 18:04:53 GMT -8 bev likes this Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by RinTin on Jun 4, 2017 18:04:53 GMT -8 Unless it gets wet, like absolutely sopping wet, wood does not conduct electricity.
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vikx
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12 volt negative bus Jun 4, 2017 22:04:19 GMT -8 bev likes this

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Post by vikx on Jun 4, 2017 22:04:19 GMT -8

Not only that, a ground is a ground is a ground. On a 12 volt system, the hot must touch the ground to short out. So, the ground bracket can be attached to anything that isn't Hot. The hot wire must never come into contact with a ground. That would be the metal frame, skin, ground wires, etc.

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alilbs New Member Posts: 6 Currently Offline	12 volt negative bus Jul 21, 2017 22:29:52 GMT -8 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by alilbs on Jul 21, 2017 22:29:52 GMT -8 Speaking of grounds, I have a 58 airflyte,I'm up dating the electrical. I installed a 15 amp breaker system and new 12 system. Can they both be grounded to the frame?

vikx Administrator Posts: 12,724 Likes: 3,613 Currently Offline	12 volt negative bus Jul 22, 2017 21:40:16 GMT -8 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by vikx on Jul 22, 2017 21:40:16 GMT -8 Yes, they both need to be grounded to the frame. Ground each separately to different frame attachments.
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alilbs New Member Posts: 6 Currently Offline	12 volt negative bus Jul 23, 2017 6:11:06 GMT -8 via mobile Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by alilbs on Jul 23, 2017 6:11:06 GMT -8 Thanks

Post by bev on Jun 4, 2017 12:09:34 GMT -8

Post by RinTin on Jun 4, 2017 18:04:53 GMT -8

Post by vikx on Jun 4, 2017 22:04:19 GMT -8

Post by alilbs on Jul 21, 2017 22:29:52 GMT -8

Post by vikx on Jul 22, 2017 21:40:16 GMT -8

Post by alilbs on Jul 23, 2017 6:11:06 GMT -8