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Eicr

Discussion in 'Electrical Forum' started by bks, Jun 22, 2015.

Discuss Eicr in the Electrical Forum area at ElectrciansForums.co.uk.

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  1. bks
    Offline

    bks EF Member

    Hello friends,
    i have been doing EICR for caravan sometimes now. On 16A or 32A hookup box with 30maRCD protection mostly found 1ohms or more Zs at hookup and more inside the van. When you put the results in schedule of test sheet which will not comply with maximum Zs value table from regs book. If you compare with amendment 3 now it gonna be even worst. When you get Zs value at hookup box 1 ohm or more on TNS earthing system ,inside the van your ring main Zs reading won't comply if you compare with regs Maximum Zs value table 1.1 ohms amendment 3 or 1.15ohms before amendment @ 80%. I have giving satisfactory EICR if I find low Cpc continuity and high insulation resistance of all circuits and in reference with 1667 ohms maximum Zs allow if you have 30ma RCD protection. I just want your opinion guys please.
     
    Last edited: Jun 22, 2015
  2. ImpededLoop
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    ImpededLoop Electrician's Arms

    Location:
    West Sussex
    Is it definetely TNS or are the caravam pitches TT?
     
  3. bks
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    bks EF Member

    Yes, it's definitely TNS earthing system around park.
     
  4. Richard Burns
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    Richard Burns Trusted Advisor

    Location:
    Cambridgeshire
    Business Name:
    Richard Burns
    If your Ze at origin and the length of supply cable are consistent with the readings you are getting then this is compliant, not ideal by any manner of means, but it does comply with the regulatory requirements.
    If the Ze and cable length do not combine to give this level of reading then there is something wrong and further investigation should be undertaken.
     
  5. driverman
    Offline

    driverman DIY

    Location:
    England
    What type of caravan park is it? ie residential, static, touring. Generally as mentioned above TT is the norm. However the distribution system can be a TN system, but then the caravan is made TT. Is there an earth rod by each van?
     
  6. davesparks
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    davesparks Trusted Advisor

    Location:
    guildford
    No, TNS is perfect acceptable, it is only TNCS supplies which cannot be used
     
  7. driverman
    Offline

    driverman DIY

    Location:
    England
    i thought that all touring sites had to be TT. Residential vans can be TNS as long as not all metal. Statics to be TT also.
     
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