Neutral Tail Burning

28 Jun 2009
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United Kingdom

I went to see a job in which the henley block gets very hot. The neutral tails get very hot and have been burning. the tails from the cu and the meter are both burnt in the henley block. the live tails are fine. the installation has got the old consumer unit. what do you think could be the problem?

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Tails undersized or, more likely, they are/were loose. As to why it always seems to be the neutral connection that gives way first, I'm not sure.
If the tails and the screw terminations are charred you will only get a good, sucessful connection by changing the Henley block and cutting back the tails to bright copper.

As noted above, they may be too small, so upgrade them to meet regs while you are at it.

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