Table 3

Approved Instrument Transformer Cabinets

(print from .pdf)

Effective June 10, 2020
Updates All Previous Tables

48" H x 48" W X 12" D
Indoor Mounting
NEMA 1 (General Purpose)
Single or Three Phase, 208 or 240 Volt
Three Phase, 480 or 480Y/277 Volt
1200 Ampere Maximum*

MANUFACTURER CATALOG #
AUSTIN COMPANY AB484812CTD/PPL
COOPER B-LINE 484812 PENN CT
E-BOX EB484812P
EAST COAST PANELBOARD PP-484812
K&S/MECO K1248
METER DEVICES 507U6853**
NJ SULLIVAN PPLCT121 
UNITY MFG. CO. TR484812DDCT1
WIEGMANN N1484812-CTPPL

MOST RECENT CHANGES

DATE MFG. CATALOG # STATUS REASON
06/2020  NJ Sullivan  PPLCT121    K&S/MECO are no longer in business; NJ Sullivan is a viable replacement.
10/2003 East Coast Panelboard PP-484812 Approved New Listing

* 800 ampere maximum for three phase, 480Y/277 volt.
Free standing switchgear or installation per Sketch 16A is required for services over 800 amperes.

** Cabinet is 13" deep.

APPLICATION: Three finger instrument transformer mounting for single or three phase, 208 or 240 volt; 480 volt or 480/277Y three phase.
MATERIAL: Galvannealed or galvanized steel with gray enamel finish or cold rolled steel with a UL recognized gray powder coat finish, minimum #14 gauge.

GENERAL SPECIFICATIONS
DOOR CONSTRUCTION: Double hinged doors are required. The hinges and hinge pins must be non-removable. Each door must have an internal stiffener, minimum #14 gauge.
LATCHING MECHANISM: A three point latching mechanism that secures both doors is required. The latching bars must pass through a guide that assures correct latching. The latching mechanism cannot protrude more than 1" inside the cabinet. All connection bolts must be permanently secured to prevent accidental contact of any metal part should the latching assembly fail.
LOCKING PROVISION: The latching mechanism handle must be designed to provide a locking provision in the closed position. This locking provision must accommodate a minimum 1/4" hasp. Key locking of the handle is not allowed.
CATALOG NUMBER: The catalog number (as listed by PPL) must be permanently marked on the inside of the right door.