Specific explanation for constructing the power distribution room in building codes adjacent to Class A factories
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According to clause 3.3.14 of the building codes, substations and power distribution stations should not be located within or adjacent to Class A or Class B factories, nor should they be placed in areas prone to explosive gases or dusts. For 10 KV and below substations dedicated to Class A and Class B factories, when separated by firewalls without doors or windows, they may be constructed adjacent to each other, and must comply with the relevant provisions of current standards such as the \"Code for Design of Electrical Installations in Explosive and Flammable Environments\" GB50058. It is required to be constructed adjacent to one of the exterior walls of the factory building, separated by a fire wall without any doors or windows. Is it required that one side of the distribution room be located within an explosion-proof area, while the other sides must be outside such an area?
Could an expert in this field explain it? Thanks in advance!
Basically, it can be understood in this way: a substation or power distribution unit rated at 10 KV or below and designed for use in Class A and Class B factories can be located adjacent to an explosive hazard area, but it must be separated by a fire wall; these days we usually use explosion-proof walls for such separation to provide both fire and explosion protection. The other three sides must be located outside the explosive hazard area, and this area can be determined by the electrical engineering team.
In other words, a dedicated substation can accommodate Class A workshops. The impact of explosive gas environments also needs to be taken into account.
Positive pressure ventilation is required if in an area with explosive gases
Is it required to have two walls on either side? Is it called being next to each other just because there’s a wall between them? Based on the construction plan, it shows two walls. I would appreciate your advice!
The building codes specify clearly that it should be attached on one side; generally, we emphasize the factory building, with a house attached to its exterior wall, while the other three walls face outward directly.
When separated by a firewall without doors or windows, buildings can be constructed side by side, but the doors and windows on the other walls must be located outside the explosion-proof zone; if positive pressure ventilation is required within the explosion-proof zone, it becomes somewhat complicated. So try to keep the doors and windows outside the area with explosive gases
Can a 35kv substation be built adjacent to it?