# Switching

#### mstrlucky74

##### Senior Member
So is a switch loop and a switch leg the same thing? I know when you bring power to the light then you have a switch loop down to the light switch and need a neutral in the box. But if you bring him power to the light switch do you still have a switch loop or just a switch leg up to light? Thanks

#### hbiss

##### EC, Westchester, New York NEC: 2014
A switch leg is the switched hot conductor going from the switch to the light. A switch loop would be a hot from the light down to the switch and the switch leg back up.

-Hal

#### mstrlucky74

##### Senior Member
A switch leg is the switched hot conductor going from the switch to the light. A switch loop would be a hot from the light down to the switch and the switch leg back up.

-Hal
So when you have a switch loop you don't have a switch leg?

#### Dennis Alwon

##### Moderator
Staff member
So when you have a switch loop you don't have a switch leg?
Yes you do have a switch leg. The wire that returns to the light to turn it on is a switch leg-- you always have that-- The switch loop takes the hot conductor down to the switch and then takes the switch leg up to the light. So a switch loop incorporates the switch leg

#### Johnhall30

##### Member
You have a switch loop if you bring the hot to the lighting junction box before the switch.

#### 480sparky

##### Senior Member
A switch leg is half of a loop. The other half of a loop is the ungrounded installed specifically to power the switch(es).

Thanks all.

#### sameguy

##### Senior Member
So the white wire!?

#### mstrlucky74

##### Senior Member
So in this scenario. Power(12/2) to the switch and you would need 12/3 up to a box between lights. 2 switch legs(a & b) and one for power. Correct?

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#### infinity

##### Moderator
Staff member
So in this scenario. Power(12/2) to the switch and you would need 12/3 up to a box between lights. 2 switch legs(a & b) and one for power. Correct?
Yes if you have two switches then a 3 wire cable (Sa, Sb, N) up to the ceiling is what you would need.

#### mstrlucky74

##### Senior Member
Sorry!! In this instance, 3 switched hots and a neutral. 12/4!

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#### infinity

##### Moderator
Staff member
Sorry!! In this instance, 3 switched hots and a neutral. 12/4!
Yes.