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by RowanMook
Sat Jun 07, 2008 4:32 pm
Forum: Electrics Forum
Topic: 411.3.3 (b)
Replies: 4
Views: 2812

The reg. is for your sockets the other way arround :)
You label them Fridge, freezer etc, so people DONT plug in extension leads to take outside.
Its for plug in equipment on the manufactorers supplied lenght lead and plug, thats why they are moulded plastic and cant be removed.
by RowanMook
Mon Oct 15, 2007 5:43 pm
Forum: Electrics Forum
Topic: electrical wire sizing!!!
Replies: 3
Views: 3402

25.0mmSQR = 5.64190mm Diameter of metal conductor (plastic sheathing extra measurement)
16.0mmSQR = 4.51351mm
10.0mmSQR = 3.56825mm
6.0mmSQR = 2.76395mm
4.0mmSQR = 2.25678mm
2.5mmSQR = 1.78412mm
1.5mmSQR = 1.38198mm
1.0mmSQR = 1.12838mm

Accurate micrometer needed :)
by RowanMook
Mon Oct 15, 2007 11:58 am
Forum: Electrics Forum
Topic: electrical wire sizing!!!
Replies: 3
Views: 3402

You are trying to calculate the cross sectional area, this is the formula Pi times the radius squared. That gives you 1.7/2 radius= 0.85 Pi= 3.14159265 =0.85*0.85*3.1415926 = 2.2698 Times 7 strands 2.2698*7=15.8886mm Squared This is subject to the accuracy of the micrometer measurement of the strand...
by RowanMook
Mon Oct 01, 2007 10:29 pm
Forum: Electrics Forum
Topic: Tap Problem for Bonding
Replies: 1
Views: 2685

Tap Problem for Bonding

I have metal taps to the sink in the bathroom that have a metal covered flexible pipe with a plastic joint to copper water feed pipes, hot and cold. They have no earth bonding at the taps or the pipes, or anywhere in the bathroom. I have a light with a fan and a hot water radiator. The light switch ...
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