Calling all electricians

[HORNETD]

Originally Posted by twinboat

You say that all conductors must be the same gauge, yet this is out there for sale.

Maybe because it is specific to a range ?Attachment 256985

Specific cords which are pre-terminated with plugs and are cut to length are not subject to the no reduction in Equipment Grounding Conductor (EGC) size. Service Cord (Type S) is.

[twinboat]

OK , that makes sense, I suppose.

Fact is, some RVers are using that kind of cord to wire in portable surge protectors, in their compartments.

Originally Posted by HORNETD

Specific cords which are pre-terminated with plugs and are cut to length are not subject to the no reduction in Equipment Grounding Conductor (EGC) size. Service Cord (Type S) is.

[Solo_RV_Guy]

Originally Posted by twinboat

OK , that makes sense, I suppose.

Fact is, some RVers are using that kind of cord to wire in portable surge protectors, in their compartments.

Some folks pick their noses in public, too. That doesn't make it right.


The reduced size of the neutral and equipment grounding conductor in the example is based on the use: the elements of a typical electric range are all 240V, and the neutral exists to derive the 120V needed for the tiny load of control electronics, timers, etc. The ground is there to trip the breaker in the event the neutral is compromised and the smaller conductor still passes sufficient current to trip the overcurrent protection device.


I'll see if I can find the NEC Article that allows this (probably in the 400 series).

[hillbilly3]

Originally Posted by Solo_RV_Guy

Some folks pick their noses in public, too. That doesn't make it right.


The reduced size of the neutral and equipment grounding conductor in the example is based on the use: the elements of a typical electric range are all 240V, and the neutral exists to derive the 120V needed for the tiny load of control electronics, timers, etc. The ground is there to trip the breaker in the event the neutral is compromised and the smaller conductor still passes sufficient current to trip the overcurrent protection device.


I'll see if I can find the NEC Article that allows this (probably in the 400 series).

You are partially correct, depending on the design of the stove, the neutral is used for more than the lights and controls. Many use 120 volts to the stove top burners to regulate the heat, so on lower heat settings, the burner is supplied with 120 volts to lower the burner output. The selector switch determines how the lines are connected. Usually this can be accomplished by switches that "click" (have definite position switches) while others have varible position (smooth) that incorporate a thermostat to turn the burners off and on. Modern upscale ovens use SCR electronic switches that turns power off and on electronically to pulse the power output, in turn controlling the amount of heat produced. Just installed a commercial deep fryer that uses this technology. Allows for more even heating.

[ToppDogg]

Originally Posted by Mageksl

The circuit I described is indeed a 240v circuit. Inside the RV it is treated and used as two 120v circuits which each need it's own neutral leg. They don't share a neutral. This is why it is important to have an electrician that is familiar with RV requirements do your working.

The main point I was trying to make is that all four wires, red, black, white and green need to be the same size and separately insulated. Look at the wire you use to plug in your 50 amp plug and you will see it indeed has four wires. All the same size, all separately insulated and colored as described above.

This is not correct, a 240v connection is wired with two hot legs and one neutral .

[twinboat]

If you had read the posts, you would see that the guy your quoting has replied that he stands corrected and now understands.

Originally Posted by ToppDogg

This is not correct, a 240v connection is wired with two hot legs and one neutral .

[hohenwald48]

Nobody ever reads a thread. They just jump in the middle of the conversation. [emoji57]