ʻO ka ʻike huahana pahū-hōʻike ʻepekema kaulana
Ua hoʻomaka ka National Fire Protection Association (NFPA) e paʻi i ka National Electric Code (NEC®) i 1897.
I mea e hiki ai ke hoʻokō i nā kūlana pahū-hōʻoia, pono i ka pā ke hiki ke hoʻokipa i nā pahū e kū mai ana i loko o kona pā a pale i nā hunaahi i loko o kona pā mai ka hoʻā ʻana i nā mahu, nā kinoea, ka lepo a i ʻole nā fila i ka ea a puni. No laila, ʻaʻole manaʻo ka pale pahū ʻaʻole hiki iā ia ke pale wale i nā pahū waho i ka wā e pili ana i nā pā uila. ʻO kēia ka hiki o ka chassis ke pale aku i nā huna huna a i ʻole nā pahū ʻana mai ka hoʻoulu ʻana i kahi pahū nui.
Pono e hoʻāʻo ʻia ka mahana o ka ʻili a i ʻole kekahi ʻāpana o nā mea uila i ʻike ʻia i ka lewa pōʻino ʻaʻole i ʻoi aku ma mua o 80% o ka wela o ka auto-ignition o ke kinoea a i ʻole ka mahu i loko o ka wahi i manaʻo ʻia ai nā mea hana. hoʻohana ʻia.
USA °C | Kona Keahole (IEC) °C | Kelemānia °C Hoʻomau - Manawa Pōkole | |
T1 - 450 | T3A - 180 | T1 - 450 | G1: 360 - 400 |
T2 - 300 | T3B - 165 | T2 - 300 | G2: 240 - 270 |
T2A - 280 | T3C - 160 | T3 - 200 | G3: 160 - 180 |
T2B - 260 | T4 - 135 | T4 - 135 | G4: 110 - 125 |
T2C - 230 | T4A - 120 | T5 - 100 | G5: 80 - 90 |
T2D - 215 | T5 - 100 | T6 - 85 | |
T3 - 200 | T6 - 85 |
Lako pahū
Wehewehe: ʻO nā lako uila e hoʻā ʻole i ka lewa pahū a puni ma lalo o nā kūlana i kuhikuhi ʻia.
Mahele ʻia i ʻekolu mau mahele:
Papa I: nā lako uila ma lalo o ka honua i nā lua lanahu;
Papa II: ʻO nā lako uila ʻē aʻe a pau no ka pōʻaiapuni kinoea pahū koe wale nā mine lanahu a me nā lua lalo.
Papa III: Nā lako uila i hoʻohana ʻia i nā wahi lepo pahū ma waho aʻe o nā mine lanahu
ʻO ka huahana JWBT810 he IIC, kūpono no IIA, IIB pahū lewa. A ʻo JWBT810 ka T6. ʻO ke kaiapuni e pili ana: ka lepo weliweli a me nā ea hau, ʻoihana petrochemical, Tunnel, metro, railway, LRT, speedway, moana, moku, offshore, mine, power plant, bridge etc.