Screw in Breaker

[scosta]

Have never seen this before, Challenger Panel
Why would there be a screw in it?
Thanks, Steve

[Paul W. Abernathy]

Steve,

What size is that breaker....and is it feeding a SUB panel or is THIS panel being fed by this breaker....? IE: is this the disconnection for this panel.....

[Larry D. Kage]

Sure doesn't look right...

[scosta]

Paul,

Its a 100amp breaker in the Main and only panel.

Steve

[scosta]

Paul,

It is a 100amp breaker, it is the disconnect for the Main and only panel.
It is the disconnect for this panel
Steve

[Jason A. Sieg, CMI]

Originally Posted by pabernathy

Steve,

What size is that breaker....and is it feeding a SUB panel or is THIS panel being fed by this breaker....? IE: is this the disconnection for this panel.....

What Paul is doing is have you think about the use of the breaker. If it is the main or the disconnect for a sub panel it is supposed to be mounted so that it is not easily removeable. That would be a proper install under those situations.

Did I explane that correctly Paul?

[jtedesco1]

Originally Posted by scosta

Have never seen this before, Challenger Panel
Why would there be a screw in it?
Thanks, Steve

Back-Fed Devices

Plug-in-type overcurrent protection or plug-in type main lug assemblies that are backfed shall be secured in place by an additional fastener that requires other than a pull to release the device from the mounting means on the panel.

[scosta]

Joe,

Backfed as in through the back of the panel?
The conductors came through the top.

Steve

[Jason A. Sieg, CMI]

Backfed does not referr to where the conductors come into the panel.

It referrs to where the electricity comes from. Like from a generator rather than from the power company.

[scosta]

Its not backfed, its a power company feed.

[jtedesco1]

http://www.comitalo.com/images/panel1.JPG

The Type SE Cables here are the "service entrance conductors" and they are energized, and therefore are "back feeding" the circuit breaker through the device screws on the CB.

[jtedesco1]

From UL:

Markings on panelboards that employ plug-on units require the use of a hold-down kit when the units are back-fed and field installed supply conductors are terminated on the plug-on unit.

The marking indicates: "Back-fed _____ requires hold-down kit Cat. No._____ " or the equivalent.

An identification of the applicable back-fed unit is specified in the first blank - for example, circuit breaker, fused switch, or terminal kit; and the catalog number of the required hold-down kit is specified in the second blank.

[Speedy Petey]

Originally Posted by jtedesco1

http://www.comitalo.com/images/panel1.JPG

The Type SE Cables here are the "service entrance conductors" and they are energized, and therefore are "back feeding" the circuit breaker through the device screws on the CB.

Exactly. And the circuit breaker is feeding the panel busses through the stab on's. Opposite of how a branch circuit breaker works.

This is a factory installed proper hold down screw. I've seen (and installed) my share of 'em.

[Greg Fretwell]

You can screw them all down if you want. It is only required if the breaker is backfed. Most commercial manufacturers make panels where all the breakers screw to the bus, no stabs or "U" clips. It certainly helps the reliability.

[jking2]

If the screw goes into the bus bar, it certainly makes it easy to check for power. Just lick your finger and touch the screw!