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  1. #241
    Hans's Avatar Unemployed (Platinum)
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    I am not a sparky, but i am not sure if u use the chassis for the 12v , can u use the 240 earth on the same chassis? Could the ecu get damaged? I would just carry a separate earth cable through.
    If u weld a car u should disconnect the battery....
    Interesting.... i would like to know

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  2. #242
    ricrhys's Avatar Unemployed (Platinum)
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    Quote Originally Posted by Hans View Post
    I am not a sparky, but i am not sure if u use the chassis for the 12v , can u use the 240 earth on the same chassis? Could the ecu get damaged? I would just carry a separate earth cable through.
    If u weld a car u should disconnect the battery....
    Interesting.... i would like to know

    Sent from my SM-T810 using Just T4s
    This was what gave me concern, and why I phoned the inverter manufacturer, he was the only guy who was definite it was fine. If I carry a separate earth cable through where do I earth it to bearing in mind I need a common earth for the split charge system.

  3. #243
    ricrhys's Avatar Unemployed (Platinum)
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    I brought the inverter and RCBO set up off a guy who brought his van off a sparky, Iíve left the wiring as he had it so youíd hope he had it right. If that makes sense.
    Last edited by ricrhys; 10th March 2019 at 11:09 PM.

  4. #244
    Hans's Avatar Unemployed (Platinum)
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    I had a look on different websites and found both versions. The reason to connect the 240 volt earth to the chassis is ,if the life wire comes lose and touch the chassis u get a electric shock if the rcb is not connected b'cos the rcb simply wouldn't work.
    But no one could answer the question 240 and 12 volt car electric (ecu) potential interference ore damage.
    Sure someone here must know.

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  5. #245
    Activ8's Avatar Moderator
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    Are the ECU'S common terminals fused? To protect it from being jumped incorrectly or the battery being fitted incorrectly?

    Isn't there specific standards called ISO7637 P1 & P2, which cover load dumps and reverse polarity connections that manufacturers sign up to?
    Last edited by Activ8; 11th March 2019 at 08:54 PM.

  6. #246
    ricrhys's Avatar Unemployed (Platinum)
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    Itís an absolute mine field looking online, Iíve spoken to two different techs at the inverter manufacturer and theyíve assured me how I have wired it is the correct way, theyíve also assured me that the load (hair straighteners getting up to temp draw about 30a for about 15sec resulting in red lights then it all goes green when they are up to temp) are close to the tolerances of the inverter but not beyond its capabilities, they have designed it with loads of protection and a massive safety factor so itíll just shut off if it gets beyond the specs so not to worry. I know this doesnít necessarily answer the earth problem but they seem to really know their shit and are telling me not to worry.

  7. #247
    damien devil's Avatar Unemployed (Platinum)
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    In my opinion the can't be that dangerous , otherwise I'm sure you would t be able to buy them online or off the shelf, they surely should be (non competent) safe for any d.i.y person., Otherwise their would be something in place saying professional fitting only , and wouldn't be as easily purchased. ( But that's just my opinion and not sound advice as I wouldn't want anyone getting a shock ) fit at your own risk.

    Come rain or shine I'm out in mine!!

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