Patrick asks this question, which is about domestic meter tails’ maximum length. It has been answered by the NICEIC (Theme – Distribution Equipment including Cable Management):
This Q & A is one of thousands posted in our Technical Expertise area, and answered on a daily basis by our Voltimum Experts.
Question: What is the maximum length of meter tails from the meter to the consumer unit?
Also, is it OK to route the tails in the cavity?
Answer: The maximum length of meter tails that can be fitted should meet the requirements of Regulations 433.2 and 434.2 in BS7671: 2008 Amendment 3:2015.
Unless the meter tails are installed in such a manner as to reduce a fault to a minimum, they should not be longer than three meters.
We would also suggest that the Distribution Network Operator is consulted as they may impose a maximum length of meter tails that can be protected by their cut-out fuse.
We would not recommend the installation of meter tails within a wall cavity for the following reasons:
- They maybe damaged during installation.
- They maybe unsupported within the cavity.
- They may deteriorate because being in contact with any cavity wall insulation.
- They maybe attacked by flora or fauna and they may breech the cavity within the wall, allowing the passage of water to the inner leaf.
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