is it possible for wire to melt and break ? why ?
Answers
Explanation:
Wires made from some special materials melt quickly and break when large electric currents are passed through them. ... If by accident the current exceeds this safe limit, the wires may become overheated and may cause fire. If a proper fuse is there in the circuit, it will blow off and break the circuit.
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Answer:
It’s the wires’ insulation that catches fire. The two materials most commonly used these days for wire insulation are PVC and Cross-linked Polyethylene. The PVC is good up to 70 deg C, and is “self-extinguishing”, meaning that it requires a constant external source of heat to maintain burning. The XLPE is good to 90 deg C, but is not self-extinguishing. Once these maximum temperatures are exceeded the material breaks down, and eventually fire is a likely result. Overheating the wires is to be avoided. Overheating can result from:
1.Overload together with improper over-current protection.
2.Short circuit together with improper short-circuit protection.
3. Don’t overload the circuit.
4. Protect the circuit properly against overload and short circuit.
5.Maintain tight connections.