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ທໍ່ຂ້າມແມ່ນພື້ນຖານສໍາລັບການວາງ "ສາຍໄຟສົດ", ວາງພື້ນຖານສໍາລັບການບໍາລຸງຮັກສາໃນອະນາຄົດ, ການທົດແທນ, ແລະສະຕິປັນຍາຂອງສາຍໄຟຟ້າໃນເຮືອນ.
ທໍ່ threading ສາມາດປ້ອງກັນຄວາມເສຍຫາຍຂອງຊັ້ນ insulation ຂອງສາຍ. ຖ້າຝັງໂດຍກົງໃນປູນຊີມັງ, silicate ອາດຈະ corrode ຊັ້ນ insulation ຂອງສາຍ, ນໍາໄປສູ່ການຫຼຸດລົງຂອງ insulation ແລະເຮັດໃຫ້ເກີດວົງຈອນສັ້ນ;