1. Cov qauv zoo li qub, cov hlau yuav tsum muaj cov ntawv pov thawj, cov chaw tsim khoom, cov kab kab thiab lwm yam, cov hlau hauv av siv cov xim daj ntsuab insulating txheej.
2. Mechanical zog.
3. Sheath rwb thaiv tsev (feem ntau ntau dua 100mω) thiab compressive zog (500V saum 1500V hauv qab).
4. Hlau kuj (ib txoj kab uas hla, conductivity, ntev tsis ntau tshaj ib tug tej yam kuj).
5. Nyob rau hauv qhov kub kub cuam tshuam 140 degrees, qis -kub-30 degrees nyob rau hauv cov hlau yuav tsis tshwm tawg.
