Question about Microwave Ovens
Hi,For residential wiring, some basic rules given in the NEC are:
* Phase wire in a circuit may be black, red, orange (high leg delta) insulated wire, sometimes other colors, but never green, gray, or white (whether these are solid colors or stripes). Specific exceptions apply, such as a cable running to a switch and back (known as a traveler) where the white wire will be the hot wire feeding that switch. Another is for a cable used to feed an outlet for 250VAC 15 or 20 amp appliances that do not need a neutral, there the white is hot (but should be identified as being hot, usually with black tape inside junction boxes).
* The neutral wire is identified by gray or white insulated wire, perhaps with stripes.
* Grounding wire of circuit may be bare or identified insulated wire of green or having green stripes. Note that all metallic systems in a building are to be bonded to the building grounding system, such as water, natural gas, HVAC piping, and others.
* Larger wires are furnished only in black; these may be properly identified with suitable paint or tape.
* All wiring in a circuit except for the leads that are part of a device or fixture must be the same gauge. Note that different size wires may be used in the same raceway so long as they are all insulated for the maximum voltage of any of these circuits.
* The Code gives rules for calculating circuit loading.
* Ground-fault circuit interrupter (GFCI) protection is required on receptacles in wet locations. This includes all small appliance circuits in a kitchen, receptacles in a crawl space, basements, bathrooms and a receptacle for the laundry room, as well as outdoor circuits within easy reach of the ground. However, they are not required for refrigerators because unattended disconnection could cause spoilage of food, nor for garbage disposals. Instead, for refrigerators and other semi-permanent appliances in basements and wet areas, use a one-outlet non-GFCI dedicated receptacle. Two-wire outlets having no grounding conductor may be protected by an upstream gfci and must be labelled "no grounding". Most GFCI receptacles allow the connection and have GFCI protection for down-stream connected receptacles. Receptacles protected in this manner should be labeled "GFCI protected".
* Most circuits have the metallic components interconnected with a grounding wire connected to the third, round prong of a plug, and to metal boxes and appliance chassis.
Hope it helps..If you don't understand what i wrote,i would advice you to contact an electrician for help..Thanks you..
Posted on Mar 19, 2011
Usually the fact that the wires have the same color does not mean that they are meant to go together. But in your situation since the other colors match then they are menat to go together. Although according to color coding the black is meant to be neutral while orange also stands for neutral.so both wires could go together. But in rare cases the wires coding could have been mixed up so best get an expert to examine it and test the cables to determine which is which to avoid unforeseen damage.
Hope this solution has been helpful?
Posted on Mar 19, 2011
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Posted on Jan 02, 2017
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