Dimensions of ALZ Distribution Box

ALZ distribution boxes typically follow standard dimensions with illustrative tolerances of ±10%, constructed for IP-55 protection and designed to accommodate MCCBs and bus bars.General Dimensions and ConstructionALZ distribution boxes are generally fabricated from 2 mm GI sheet steel with reinforced bodies and slanted roofs for water runoff. The dimensions are illustrative, with tolerances of ±10% over the specified size, allowing flexibility for different capacities and configurations ( ). Standard boxes are designed to house one bus bar arrangement with 4-pole MCCBs and outgoing feeder arrangements with 2 sets of 3-pole MCCBs, with adequate internal clearance for safe operation ( ).Mounting and LayoutEarthing points: Two solid earthing points on either side of the box.Cable entry: Heavy-duty, double compression cable glands at the bottom for incoming and outgoing cables.Internal barriers: Metallic or heat-resistant insulating barriers between MCCBs to prevent heat transfer during faults.Lighting provision: Some boxes include internal lighting arrangements.Locking: Godrej-type 3-position locking system with optional manual locking galvanized to prevent rust ( ).Protection and ComplianceIP Rating: IP-55, ensuring protection against dust and water jets.Standards: Conforms to IS-13947 (part 2) / 1993 for MCCB installation and electrical safety.Testing: Type-test certificates from CPRI or government-approved laboratories are required for compliance ( ).Notes on DimensionsWhile exact length, width, and height for ALZ boxes are not universally published, the illustrative dimensions provided in technical specifications serve as a reference for procurement and installation. Users should confirm the specific model and number of ways (1-way to 36-ways) to determine precise measurements ( ). In practice, when planning installation or ordering, it is recommended to specify internal vs external dimensions and account for the ±10% tolerance to ensure proper fit and compliance with electrical safety standards.