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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: I am going to take a 240 v line and split to 2-120v dedicated lines- Does anyone have a site to look up the details on how to do it to code? posted by Carl G on September 22, 2000 at 14:41:45:
For safety, a 120V circuit needs one hot wire (black) at 120VAC, one neutral wire (white) at 0VAC, and one ground wire (bare or green). A pure 240V circuit (as used for most electric water heaters) will have two hot wires (red and black) each at 120VAC (180 degrees out of phase) and one ground wire (bare or green). Therefore, a pure 240V circuit CANNOT safely be split into 2 120V circuits.There is also a 120/240V circuit (as used for most electric ranges, because parts like lights and clocks need 120V, and parts like heating elements need 240V. It has two hot wires (red and black) each at 120VAC (180 degrees out of phase), one neutral wire (white) at 0VAC, and one ground wire (bare or green). This circuit CAN safely be split into 2 120V circuits: one gets the black wire, the other gets the red wire, each gets a neutral wire spliced to the original neutral wire and a ground wire spliced to the original ground wire. The doubled circuit breaker is then replaced by single breakers. (Sometimes a connecting pin can just be removed.)
This is valid ONLY if the one outlet you replace was the ONLY item on that circuit. This method STILL MAY NOT meet your state and local electric code.
There is another option, which will work for either a pure 240V circuit or a 120/240V circuit. A large 240V-to-120V step-down transformer--properly wired to provide an unbroken ground connection.
This installation would provide ballanced power (which many claim benefits performance) to your audio equipment.
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Follow Ups
- splitting a 240 v line into 2-120v lines - Patrick Kopson 15:09:44 09/22/00 (0)
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