in শিক্ষা বিভাগ by

Insulation and sheath are the components of a cable that protect the conductor. The insulation isolates the flow of electricity, and the sheath wraps around the outside of the cable to protect the conductors inside. The choice of material used for insulation and sheath can have a significant impact on the overall performance of a cable. The following will provide you with an overview of the most common materials used in cable manufacturing.


PVC (Polyvinyl Chloride) – For internal installations.Polyvinyl Chloride (PVC)

PVC is the most common and cheapest option for a given cable yarn design, it offers good flexibility, low cost and reasonable durability. It also offers good resistance to oil and water. The disadvantages are that some grades of PVC can weather badly and are susceptible to UV light. It can also give off poisonous halogen gases, toxic fumes and smoke when burnt. 


PE (Polyethylene) – For external installations.

PE can be stiff and very hard, however low density PE (LDPE) is more flexible. If it’s UV stabilized it offers excellent moisture and weather resistance. Often referred to as duct grade or weather resistant, high density PE sheath material (HDPE) can offer a good option for external or direct burial applications.


LSF (Low Smoke & Fume)

A modified PVC compound which can produce less HCI gas and smoke than PVC cables. However, LSF is a somewhat meaningless term, because it is PVC based it could still emit up to 22% Hydrogen Chloride (HCl) gas when burnt and give off black smoke. By way of comparison, standard PVC gives off up to 28% HCl.

Your answer

Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
বক্সে লিখুন আকাশ
To avoid this verification in future, please log in or register.

Related questions

0 answers
0 answers
0 answers
asked Nov 8, 2021 in শিক্ষা বিভাগ by anonymous
উত্তর সন্ধানী! বেস্ট বাংলা প্রশ্ন ও উত্তর ওয়েবসাইট। প্রশ্ন করুন, উত্তর নিন, সমস্যা সমাধান করুন ।
উত্তর সন্ধানী কি?
উত্তর সন্ধানী বাংলা প্রশ্ন ও উত্তর এর ওয়েবসাইট।
গোপন প্রশ্ন ও উত্তর। ডিজিটাল শিক্ষায় প্রশ্নের উত্তরের সেরা ওয়েবসাইট।