Electrical Sub-Main Distribution Boards (SMDBs) are the integral part of Electrical LV Power distribution network in the end user premises of a medium and large scale projects. SMDB acts as a mediator between Main Distribution Board (MDB) and Final Distribution Boards (FDBs) that serves approximately 100A to 400A load range. The drawings given here shows how to install:
Lighting Distribution Boards are an integral and essential part of every building project and it must be designed, manufactured and installed all in accordance with the safety standards. In most of the cases it operates a layman wherein others operate dedicated or trained personnels. This article explains what are the basic and essential standards, parts, frame to be applied for manufacturing and installation of lighting distribution boards in a building project.
Building projects requires MV Distribution Panel-boards for distribution of power to each utilities. A good electrical distribution network will have proper design, right components, and future load provisions. Space utilization will also be an important factor for maintenance and handling of the equipments. Here we look into what are the features required for design, manufacture, install a MV Distribution panel board including its BIS (IS) standards that serving building projects.
This specification intended to supply, install, test and commission mineral oil immersed 1500 KVA, 3 phase indoor transformers, fitted with cable boxes, bolts, and all necessary accessories. Transformers shall be indoor type, oil filled, two winding, four off load capacity, 2.5% taps, two above and two below high voltage rating in compliance with IEC 76 or BS 171.
Low Voltage Switchgear are familiar to every people since they are the controlling mediators between low voltage utilities and equipments with human beings. Be it a common home DB or an isolator or control centres, they all are being manufactured to use untrained people ie., common people. The scope of works shall cover the supply installation, testing and commissioning of main and sub-distribution boards, panel boards, fusible safety switches, circuit breakers etc. Associated minor building works require for the erection of the distribution boards and panels shall be included in the scope of work.
Main earthing bar is to be provided in main distribution room and connected to earth electrode by 2 insulated conductors (minimum 150 mm2) via testing joints. Earthing bars of main distribution boards are to be connected, by insulated earthing conductor, directly to main earthing bar at main distribution room.