MT/T 412-1995 Flameproof low voltage terminal blocks for electrical equipment

This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of low-voltage wiring terminals for flameproof electrical equipment (hereinafter referred to as wiring terminals) made of Class A arc-resistant insulating materials. This standard applies to low-voltage wiring terminals for flameproof electrical equipment of Class dⅠ and dⅡB with rated voltage up to 1140V, rated current up to 630A and frequency up to 50Hz. This standard does not apply to wiring terminals for direct-in flameproof electrical equipment. MT/T 412-1995 Low-voltage wiring terminals for flameproof electrical equipment MT/T412-1995 Standard download decompression password: www.bzxz.net

Coal Industry Standard of the People's Republic of China
Flameproof low-voltage terminal blocks for electrical equipment
1 Subject content and scope of applicationwwW.bzxz.Net
MT/T412-1995
This standard specifies the classification, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flameproof low-voltage terminal blocks for electrical equipment (hereinafter referred to as terminal blocks) made of Class A arc-resistant insulating materials. This standard applies to dI and diB grade flameproof low-voltage terminal blocks for electrical equipment with rated voltage up to 1140V, rated current up to 630A and frequency up to 50Hz.
This standard does not apply to terminal blocks for direct-in flameproof electrical equipment. 2 Reference standards
GB1411
GB1497
Basic test methods for low-voltage electrical appliances
High-voltage and low-current intermittent arc resistance test methods for solid electrical insulating materialsBasic standards for low-voltage electrical appliances
GB/T1804
General tolerancesUnmarked tolerances for linear dimensions
GB/T2423.4Basic environmental test procedures for electrical and electronic productsTest Db: Alternating damp heat test methodsGB3836.2
Explosion-proof electrical equipment for explosive atmospheresExplosion-proof electrical equipment "d"Explosion-proof electrical equipment for explosive atmospheresIncreased safety electrical equipment "e"GB4207 Solid insulating materials Determination method of tracking index and proof tracking index of materials under humid conditions JB834 Technical requirements for tropical low-voltage electrical appliances
JB4159
3 Product classification
General technical requirements for tropical electrical products
3.1 Single-core terminal blocks
3.1.1 Cylindrical mounting terminal blocks
3.1.1.1 Varieties and specifications
According to the rated insulation voltage U:, thread specifications of conductive rods and wire entry methods, there are 20 varieties, see Table 1\A" Table 1
Thread specifications of conductive rods
Wire entry methods
U:≤660
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