looking for free wiring diagrams for residential electrical?

Question

specifically, breaker box at service entrance, how many amps should i use for main breaker

Answer 1

If in the US, you will probably want a 100 A.,120-240 V, 1φ-3W breaker panel using plug-in breakers. Your Main should be 100 A/2P. Your Range, A/C, and dryer breakers will probably be 30A/2P. Washer, Furnace Fan, and Refrigerator usually take 15 A/1P. The rest is almost wholly dependent on house design, what kind of appliances you want and where you want them. Unless the house is a tract house it will have a unique wiring diagram.

Please note that these are generalities. The wiring for your home should be designed by an Electrical Engineer or Electrical Contractor, and installed by a licensed Electrician.

Answer 2

for residential, main breaker is 30A, for Convenience Outlets, use 20A breaker and for Lighting Outlets, use 15A circuit breaker, this is the standard one...for the service entrance use 5 mm squared TW or THW wire..

Answer 3

computations are in the electrical codeNEC or CEC, but if you can't get any of them, then compute for your total load, be aware of the demand factors for such equipments like ranges and dryers, but know your loads first or compute via watts per square feet.

Answer 4

See http://www.hotwaterproducts.com/BWC/Parts/Pdfs/Electric%20Wiring.pdf