Special Features

Panelboard interiors and special fronts can be furnished to fit existing boxes. First, price the complete panel along with the appropriate price adder from below. Next, photocopy the Retrofit Existing Box data sheet found on page 4-15, record the required dimensions on the photocopy and forward it with your order to the nearest Schneider Electric sales office. For interiors requiring vented enclosures, contact your nearest Schneider Electric sales office for assistance.

Existing box depth on flush installations must be measured from inside surface of box to outer wall or plaster surface.

Special Fronts

Existing box the same depth as or deeper than our standard.

Elevating brackets to be supplied by customer for existing boxes deeper than our standard.

Existing box shallower than our standard. Requires a box extension (surface applications) or
a formed front (flush applications). A hinged trim front option is not available for these applications.

A formed front is available on NQ and NQOD (225 A max.) and, NF (250 A max.). When a flush front is required for an existing box that is shallower than our standard, be sure to indicate the position of the box with respect to the wall in which it is mounted. This is required in order to determine whether a box extension with a flat front should be supplied, or whether a flush formed front is more applicable. The interior must be centered in the box and, if the box is deeper than our standard, the interior must be leveled within the box. The existing box for NQ, NQOD and, NF panels cannot be more than 1.5 inches shorter than the standard box. Special trims that are manufactured to fit an existing box will be within ± 0.25 inches of the specification. Refer to the table below for standard box depths and for the maximum depth for which no special mounting brackets are required.

Table 4.5:

Panelboard Box Depths

Panelboard Type

Standard
Box Depth

Maximum Box Depth
for which

No Special Mounting Brackets Required

NQ or NQOD standard width—main lugs only

5.75 in.

NQ or NQOD standard width—main circuit breaker

5.75 in.