Re: Electrical wiring

On Aug 11, 9:29 am, "Leon" <removespamlcb11...@xxxxxxxxxx> wrote:
"Mike Marlow" <mmarlowREM...@xxxxxxxxxx> wrote in message

news:90350$46bda9c1$452894f3$15760@xxxxxxxxxxxxx


http://www.electrical-online.com/planningacircuit.htm

Do-It-Yourself Repairs and Basic Wiring Projects:
Planning a Circuit

By Terry Peterman, the Internet Electrician
Summary: Planning a circuit in your home requires examining some
basic rules regarding the number of lights permitted on a circuit, and
recommendations for mounting boxes, receptacles and switches.



When planning to hook up a circuit, whether it is a new one directly
from the breaker panel or adding to an existing one, here are some
general rules to follow :

Maximum Lights Per Circuit

You are only allowed to put a maximum of 12 lights on one 15 amp
circuit, but try for between 8 and 10, if you are combining
receptacles and lights.

Remember that switches don't count as outlets. Run a separate circuit
for any large appliances, pumps, and motors etc.

Mounting Boxes

Start by marking the studs where you want your receptacles, switches,
and lights to be located. Then mount your outlet boxes.

Screws are required for octagon boxes but you can use either screws or
nails for switch and receptacle boxes. The important thing to remember
is to make the boxes secure because, once the drywall is on, it's hard
to re-attach them if they do work loose.

Don't forget that you must leave the boxes sticking out from the face
of the stud, slightly less than the thickness of the product that the
wall will be finished with.

Mounting Receptacles

Mount receptacles about 300 mm (12 inches) above the floor. The
general rule is that a receptacle is required for every 3.6 meters (12
feet) of usable wall space.

You are probably curious as to what useable wall space means
exactly...any measurement from the corner of a wall to a closet,
fireplace, or to where the door swings open is considered useable wall
space but, only if the wall is over 900 mm (3 feet) to begin with.

A receptacle is needed every 3.6 meters (12 feet) along a continuous
wall space so that at no time can a cord connected devise be any more
than 1.8 meters (6 feet) from an outlet. Also remember that there is
no maximum number of outlets, so make sure you have enough, and that
they are placed in convenient locations once the room is finished.

Mounting Switches

Mount switches on the inside of rooms opposite to the side that the
door opens. Make them as close as practical to the door opening, but
not so that the cover plate will interfere with the door casing.

The height is fairly flexible, but should be consistent and practical
(any where from 1.1 to 1.3 meters or 44 to 52 inches).


.

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