Explosion proof shell material for Class 1 electrical equipment

1The casing of electrical equipment used in mining workfaces (including electrical dual equipment installed on coal mining machines, tunneling machines, rock loading machines, conveyors, etc.) must be made ofZhongnuo TestingMade of steel plate or cast steel. Other components or parts that cannot be impacted by external forces after assembly and have a volume not exceeding2000A cubic centimeter shell with a usable grade not less thanHT2500Made of gray cast iron. But in addition to the motor base, which must be made of steel plate or cast steel, other components of the motor can also be usedHT250Made of gray cast iron.

2The shell of electrical equipment for non mining working faces can be used with a grade not lower thanHT250Made of gray cast iron

3The casing of specialized electrical equipment for tunnels is not subject to regulations2Limitations on Points.

4The shell volume shall not exceed2000When measuring cubic centimeters, it is advisable to use non-metallic ringback tones, but it is not allowed to directly use threads for fastening on non-metallic shells (except for outlet ports)