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Old 02-16-2017, 08:26 AM   #11
Mini-Skoolie
 
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Thanks everyone. Hopefully wrapping my electrical up soon!
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Old 02-16-2017, 08:54 AM   #12
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i set my bus up with a "floating" 12v house circuit. i do not use the bus body to ground it at all.

there are some advantages to have the systems separate, and some advantages having them tied together.

some of the comments are right on like you can't charge your house bank with the alternator. they'll need their own charger. on the plus side, it wouldn't drain your truck battery, no matter what. and its probably safer, if you're willing to run 2 wires everywhere.

safer because the 2 systems will not short out each other. i can take a hot wire from the house battery, and accidentally brush it against the body and nothing happens.
my battery charger for the house battery does ground to the chassis. but its only the 120v side that grounds, the output from the battery is "floating".
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Old 05-31-2017, 10:33 AM   #13
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pardon me for interrupting (have electrical question)

... but you guys seem to know your stuff. we are starting rough in framing and electrical on our conversion. i want LOW EMF as much as possible. (yes, yes, i'll get my tin foil hat right after the conversion). moving on, our low EMF protocols (metal conduit from battery array to electrical cabinet, isolated ground MC wiring, etc. all require separate grounds.

i am paying an electrician with solar and bus conversion experience to install the electrical but i like to ensure that things are done correctly.

the multiple grounds all specify separate grounding "earth ground". how will this be done in a bus conversion?
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Old 07-24-2017, 01:03 AM   #14
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Chair rail or steel rib

Can we get clarification that the chair rail or steel "ribs" of the bus are an adequate for "grounding to the chassis." It seems like a logical place to ground to so cutting holes in the floor could be avoided. I was wondering the same hitting. Any insight?

I will need to ground my 110 box, my battery bank (because I am running a battery isolator for charing while going down the road too) and I have an AIMS 3000W inverter. Does the AIMS inverter need to be grounded (and can it be done on the chair rail or a metal rib)?

Thanks everyone!
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Old 08-01-2017, 04:32 PM   #15
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Ground is ground. The lower chair rail seems to be an obvious point, but how do you propose getting electricity from the battery bank to your inverter without drilling holes? Scotty can't beam the electricity up to your inverter.

On a side note, try to make the cable run from the batteries to your inverter as short as possible.
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Old 08-02-2017, 11:28 AM   #16
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I can agree with Cptn S that ground is ground----with the stipulation that regardless of the source of the electricity, shore, genny, inverter or battery the ground must be directed back to its original source. If you are using a genny the ground must go back to the genny. If you are using Ma Edison's electric then the ground MUST go back to Ma Edison, if you are using an inverter the ground must go back to the inverter. The chair rail is not the issue.

Take the time to Google grounding issues Skoolie.net. You will find this method of searching Skoolie to be better than using Skoolie's own search mechanism.

Improper grounding can lead to your bus having a "hot skin". If this happens, YOU become the ground rod when you step on or off the bus--a real killer deal.

Jack
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Old 08-02-2017, 03:30 PM   #17
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It isn't totally clear from the context what's meant by "grounding" (ac safety ground, or dc negative/return). I'd humbly submit that the negative wire on the dc supply side of a 3kW inverter really ought to have its own cable back to the battery negative -- don't send ~300 amps back via jumpers to the chassis/body. For the ac safety ground: choose a place that's accessible for inspection later and clean it down to bare metal.
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Old 08-02-2017, 07:22 PM   #18
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Here is a easy to understand article on RV electrical.
Are “Little” Shocks OK? | No~Shock~Zone.

Its author is Mike Sokol. Mike provides both text and wiring diagrams that cover the AC circuit in your bus. He explains line, common and (safety) ground and where each must be hooked up.

Jack
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Old 08-03-2017, 05:30 PM   #19
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The 10 Commandments of Electrical Safety - Navy Version

I Beware of the lightning that lurketh in seemingly uncharged capacitors, lest it cause thee to bounce upon thy buttocks in an unseamanlike manner and cause thy hair to stand on end, thereby exceeding regulation length.

II Cause thou the switch that supplieth large quantities of juice to be opened and thusly tagged, that thy days may be long in this earthly vale.

III Prove to thyself that all circuits that radiateth and upon which thou worketh are grounded and thusly tagged, lest they lift thee to radio frequency potential and causeth thee to radiate with the angels.

IV Tarry thou not amongst those fools that engage in intentional shocks, for they are not long of this world and are surely unbelievers.

V Take care thou useth the proper method when thou taketh the measure of high voltage so that thou dost not incinerate both thee and thy test meter. For verily, though thou has no NSN and can be easily surveyed, the test meter has one, and as a consequence, bringeth much woe unto thy supply officer.

VI Take care thou tamperest not with interlocks and safety devices, for this incurreth the wrath of thy department head and bringeth the fury of thy commanding officer on thy head.

VII Work thou not on energized equipment without proper procedures, for if thou dost so, thy shipmates will surely be buying beers for thy widow and consoling her in certain ways not generally acceptable to thee.

VIII Verily, verily, I say unto thee, never service equipment alone, for electrical cooking is a slow process, and thou might sizzle in thy own fat upon a hot circuit for hours on end before thy maker sees fit to end thy misery and drag thee into his fold.

IX Trifle thee not with radioactive tubes and substances lest thou commence to glow in the dark like a lightning bug and thy wife be frustrated and have no further use for thee except for thy wages.

X Commit thou to memory all the words of the prophets which are written down in the 300th chapter of thy Bible which is the "Naval Ships' Technical Manual", and giveth out with the straight dope and consoleth thee when thou hast suffered a ream job by thy division LPO.
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Old 08-04-2017, 10:30 PM   #20
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Quote:
Originally Posted by CaptSquid View Post
The 10 Commandments of Electrical Safety - Navy Version



I Beware of the lightning that lurketh in seemingly uncharged capacitors, lest it cause thee to bounce upon thy buttocks in an unseamanlike manner and cause thy hair to stand on end, thereby exceeding regulation length.



II Cause thou the switch that supplieth large quantities of juice to be opened and thusly tagged, that thy days may be long in this earthly vale.



III Prove to thyself that all circuits that radiateth and upon which thou worketh are grounded and thusly tagged, lest they lift thee to radio frequency potential and causeth thee to radiate with the angels.



IV Tarry thou not amongst those fools that engage in intentional shocks, for they are not long of this world and are surely unbelievers.



V Take care thou useth the proper method when thou taketh the measure of high voltage so that thou dost not incinerate both thee and thy test meter. For verily, though thou has no NSN and can be easily surveyed, the test meter has one, and as a consequence, bringeth much woe unto thy supply officer.



VI Take care thou tamperest not with interlocks and safety devices, for this incurreth the wrath of thy department head and bringeth the fury of thy commanding officer on thy head.



VII Work thou not on energized equipment without proper procedures, for if thou dost so, thy shipmates will surely be buying beers for thy widow and consoling her in certain ways not generally acceptable to thee.



VIII Verily, verily, I say unto thee, never service equipment alone, for electrical cooking is a slow process, and thou might sizzle in thy own fat upon a hot circuit for hours on end before thy maker sees fit to end thy misery and drag thee into his fold.



IX Trifle thee not with radioactive tubes and substances lest thou commence to glow in the dark like a lightning bug and thy wife be frustrated and have no further use for thee except for thy wages.



X Commit thou to memory all the words of the prophets which are written down in the 300th chapter of thy Bible which is the "Naval Ships' Technical Manual", and giveth out with the straight dope and consoleth thee when thou hast suffered a ream job by thy division LPO.


Amen. Oh and never place a 3 dimensional radar array in pencil beam mode, crank output power to 1 billion watts - and attempt to flame seagulls flying around your port of call. It may interfere with local ATC radars and cause great backlash on your command!


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