Discuss Caravan site readings on TT system in the Electrical Forum area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:   American Electrical Advice Forum

Reaction score
51
Hi, have a distribution unit which feeds some caravan boxes TT system, it has upfront 300mA RCD and double pole 60898, now I’ve been sent to re gland as the disconnect times wasn’t met, but I’m getting readings of 0.30 ohms when max is either TT 167 ohms or if you go by MCB then 0.59? But the boxes have there own RCD/MCB Maybe last persons tester wasn’t calibrated? Very low but paralel paths?
 
Assuming this is the 400A 60947-2 device you mention in your other thread the 0.30 Ze at source is too high without needing to know the Zs. Aside from needing to know the manufacturer and other details it will be too high.
 
I’m thinking tighten up the gland and see what I get and yes it’s 4 core 120mm

Cant you test the swa braiding with shroud removed? This will eliminate the gland being the problem if still high reading.
I would not be happy having the site on TNS as there is no way of guaranting the supply its pme at transformer or may be in the future. TT it.
 

Reply to Caravan site readings on TT system in the Electrical Forum area at ElectriciansForums.net

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

Electrical Forum

Welcome to the Electrical Forum at ElectriciansForums.net. The friendliest electrical forum online. General electrical questions and answers can be found in the electrical forum.
This website was designed, optimised and is hosted by Untold Media. Operating under the name Untold Media since 2001.
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock