MH26 - Panelboard enclosure box, NQ/NF, Type 1, 20in W x 26in H x 5. This publication contains the following new or updated information. 81 ft)] for standard cable lengths. Aluminum construction helps protect against vandalism and harsh environmental conditions, while knockou dually fed 26-position DC distribution panels. Futina FTTL series DB box 20/26/36 way is divided into two kinds, flush mounted type and surface mounted type. The DIN-rail can be adjustable, and the two terminals (ground connection and zero connection) in the box are easy for the user wiring and routing. It includes specifications for TOP-TS, TOP-TF, TOP-LS, TOP-PS, TOP-PF, and TOP-S distribution boxes that range from 1-way to 36-ways.