Hlau npaj yog ib qho tseem ceeb rau kev tsim cov hlua hlau, nws yog thawj kauj ruam los ua qhov kev npaj.IPC-A-620 txheeb xyuas cov hlau conductor deformation thiab sib cais spec hauv 3.2/3.3 seem. Hauv qab no yog cov spec rau siv.
Lub Hom Phiaj - Chav Kawm 1,2,3
• Strands tsis flattened, untwisted, buckled, kinked los yog lwm yam
deformed.
Txaus - Chav 1,2,3
• Hlau strands cuam tshuam thaum lub sij hawm tshem tawm rwb thaiv tsev
rov qab los kwv yees lawv qhov qub nteg.
3.3 Hlau sib cais (Birdcaging)
Hom phiaj - Chav 1,2,3
• Tsis muaj noog.
Txaus - Chav 1,2,3
• Hlau strands muaj kev sib cais (birdcaging) tab sis tsis txhob tshaj
tsawg dua ntawm:
• Ib txoj kab uas hla los yog
• Tsis txhob ncua dhau ntawm cov kab hluav taws xob rwb thaiv tsev sab nraud.
