Meter Tails 16mm 0r 25mm

[ezzzekiel]

i can never really understand these types of questions, tails are cables and should be rated the same as any other circuit design if 16mm can carry the required current and the service fuse is correctly rated then whats the problem?

the osg basis all its designs on a 100a supply.

 

[Engineer54]

I think it will be very unlikely that a domestic installation will be drawing more than 60A for any length of time. Getting close to that figure, will only be in situations where instant shower units are in use. Even then, the average time a shower is in use is counted in minutes ...not hours.

Going back more years than i really care to remember, when those that had electric ovens, were going full pelt over the Xmas holidays along with electric heaters of various ratings blasting out heat and head fuses were rarely above 40A (as were the ratings of the DNO meters. The on-call Authority electricians rarely, if ever got called out to replace blown head fuses or burnin/melting tails, ...lol!!!.

Now days, all we want to do is increase and increase fuse ratings and tail sizes.... The chances are that the DNOs supply cable is far smaller in size than the tails, especially if it is an older property!! Not only that, anything that much newer, and of anything like 25mm, will probably be in aluminium conductors too!!!...

 

[Dan]

Just bumping some threads in the Electrical Wiring Theories and Regulations forum category here on our Electricians Forums. If this specific topic isn't current, just ignore it, it'll drop off the list in no time. However, if it's something you'd like to contribute to, feel free to reply and bring it back into current discussion.