Standard two-column panel installation with a Cup Pin and a Hook Pin “holding” circuits on (e:g. main frame computer and a pump). The Cup Pin is the preferred pin for “holding” circuits on because it has a wider range of capability.

Standard two-column panel with the rail installed in the center. One-Way Pins are used to lock out one circuit, Two-Way Pins are used to lockout opposing circuits, and a Cup Pin is used to “hold” circuits on. It is a good practice to install Circuit-Safe for the capacity of the panel rather than the currently used circuits.

Depending on the spacing between columns and the available panel space for a center mounted rail assembly, sometimes a panel requires the installation of two Circuit-Safe rails (one for each column). In this case, the center of the panel is raised away from the surface of the circuit breakers and so the rail assemblies are mounted to the “outside” of the breakers.

A close-up of the prior image shows the use of a Hook Pin to lockout the circuit. Because the rail assemblies are located on the “off” side of the breaker, a Hook Pin is required to prevent the breaker from moving to the “on” position. A One-Way Pin or Spade-Pin (as shown here) can be used to “hold” a circuit on.

Sometimes, due to panel configuration, a rail assembly cannot be mounted directly onto the deadfront panel. In these situations, “L” shaped Offset Brackets can often be used to install the rail assembly. The Offset Brackets mount with self-tapping screws onto a panel surface perpendicular to the deadfront, and extend out to provide a base for installation of the rail assembly. In this image, a short rail is mounted on Offset Brackets to engage a large frame breaker handle.

Some large frame breakers may require a Circuit- Safe Large Frame Lockout Set. Generally, the Large Frame Set is appropriate when the standard rail assembly pins are not long enough to engage the breaker handle. In this case, the circuit could not be turned off for the photo and so the pin is in the slot below the breaker handle. The position of the lockout device between breaker columns enables it to lockout the circuit to the right or to the left.