When greater than six branch circuits are required, the NEC requires a main disconnect and overcurrent protection device ahead of the meters. A main breaker module serves as this single point of disconnect and overcurrent protection. A main breaker module consists of a pull section to house the lugs for connecting to the utility feed and the main breaker. A main breaker module does not provide the option for compression lugs and thus, when the utility specifies compression lugs, a separate pull box is required.

GE Meter Mod III Main Breaker Module, 4-Wire Bottom Feed, 208Y/120 VAC, 120/240 VAC Delta Hi-Leg, 1600 A, 3 ph ph, RG Frame, 100 kA Interrupt, 3 Pole, NEMA 3R Enclosure, 57.13 in H x 25.1 in W x 14.89 in D Dimensions

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/GE_TMP3BB16R_Full_Engineering_Drawing.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/GE_TMP3BB16R_Full_Engineering_Drawing.pdf
• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/GE_TMP3BB12RAR_Manual.pdf https://www.iesbuy.com//ASSETS/DOCUMENTS/ITEMS/EN/https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/GE_TMP3BB12RAR_Manual.pdf

• All mains are required to be center feed only when main breaker is greater than horizontal bus amps