Siemens Power Mod™ WB3300TUNH 4-Wire Type WB Blank Endwall Low Voltage Skinny Top Feed Main Circuit Breaker Module, 240 VAC, 300 A, 3 Phase

Siemens Power Mod™ Main Circuit Breaker Module, 4-Wire Type WB Blank Endwall Low Voltage Skinny Top Feed, 240 VAC, 300 A, 3 Phase, JXD6, Non-Interchangeable/Thermal Magnetic Trip, 100 kA Interrupt, 3 Poles, NEMA 3R, Handle Actuator, Line Side Lug, G90 Galvanized Steel, 45.06 in H x 9.56 in W x 11 in D

Power Mod™ skinny mains are up to 45% narrower than the standard main devices because they only allow for one feed direction. The existing standard 200 to 1200 A WB mains are wider because they allow for combination feed, hence the "C" suffix in the part number. Combination feed models allow the installer to feed cables through either the top or bottom of the unit. The skinny mains only allow the installer to pull cable into the unit from one predetermined direction. Be sure to use a unit with a "B" suffix for bottom feed and "T" suffix for top feed. If you are uncertain of which feed direction will be needed on the job, please avoid using the skinny mains and use combination feed units in these instances.