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the cable sizes are...:
lighting=1mm-1.5mm
sockets-boiler controls=2.5mm
cooker=6mm
shower=10mm (can vary depending on the showers output)
earthing conductor of 10mm
earth bonding conductors of 6mm
25mm tailings (you're supply cables from the meter)
The sizes also depend on weather or not the cable is wired in old colours (i have only entered the new cable sizes)
circuits used are...:
ring main.
radial=only used if there are limited sockets being installed on a circuit.
lighting is just 1 cable going out and spreading to each light and switch (upstairs and downstairs lighting should be on a separate mcb)
cooker-1 cable going out of mcb.
shower-1 cable going out of mcb.
I hope this information helps as i don't fully understand what you are wanting to know from you're question. If you need any more help please let me know, or anyone else for that matter.
What else can I help you with?
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CU this is the right answer by killerjo
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They are not grounded therefore can not carry an electrical charge.
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by its wirings...... ^_^
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This seems like a question from an electrical course, and is probably best answered by your course materials. It's your test question, not ours, and there won't always be someone to ask the answer of. Earn your diploma.
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some examples of screws in a house-a bulb holder , a jar lid or a bottle cap.
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lightning
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It is an electrical insulator. Most stones are examples.
