What happens if the fuse wire is thick?
The conductor resistance is proportional to its length and inversely proportional to its cross-sectional area. so, if the fuse cable is thick, a larger cross section reduces the resistance across the fuse cable. so, even high currents flowing through the fuse, it does not explode.
What is fuse wire what is the advantage and disadvantage of using a thick fuse wire?
It is a wire made out of a metal like tin or tin alloy having a very low melting point. When a high current flows through a circuit, the fuse wire gets heated or melts due to short-circuiting or overloading. Hence the circuit is broken and the current stops flowing. This saves all the appliances of the circuit.
Is it right to use a thick copper wire in place of a fuse explain?
No, we cannot use copper wire as fuse wire because the melting point of copper is higher and resistance is low and hence, current can flow through it without melting it or breaking the circuit and it can’t be limited.
How does the thickness and length of a fuse wire depends on its current rating?
Best Answer (i)The current rating of the fuse wire is directly proportional to the thickness of the fuse wire. Higher the thickness of fuse wire, higher will be the current rating. (ii) The current rating of the fuse wire is independent on its length.
Does fuse depend on length?
The rating of a fuse depends upon the thickness of the fuse wire(because length of the wire is fixed). So, the thickness of the fuse wire in 8 A circuit is more than that of the fuse wire in 5 A circuit.
What is the rating of fuse wire?
Once this wire gets melted, the current stops flowing into the circuit and hence the equipment gets saved from high voltage fluctuation. Now, the usual current rating of the fuse wire in the line to feed application of 2kW or more power is 15A. This is the value that is commercially used for construction of fuses.
What is Max series fuse rating?
The module manufacturer also lists the maximum series fuse rating. This value dictates the largest size OCPD that can be used — typically modules have 15A or 20A series fuse ratings. Therefore, if three strings are placed in parallel, the output circuit OCPD’s rating would be calculated as: 32.7A × 1.25 = 40.8A.
What size fuse should I use?
The fuse rating should lie somewhere between these two values to allow normal operation but blow on overload. For example, if the normal expected current draw is 10A and the cable size is 25A, then a fuse rated at 15A would be appropriate.
What are the different fuse sizes?
Size groups
| Blade size | Blade group | Common ratings (maximum current) |
|---|---|---|
| LP-Mini (low profile) | APS, ATT | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
| Mini | APM, ATM | 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30 |
| Regular | APR, ATC, ATO, ATS | 0.5, 1, 2, 3, 4, 5, 7.5, 10, 15, 20, 25, 30, 35, 40 |
| Maxi | APX | 20, 25, 30, 35, 40, 50, 60, 70, 80, 100, 120 |
What gauge wire should I use for 12v?
Maximum current – amps – through a 12V circuit – related to size (AWG) and length of wire
| American Wire Gauge (#AWG) | ||
|---|---|---|
| Length (feet) | Maximum Current (amps) | |
| 25 | 14 | 10 |
| 30 | 12 | 10 |
| 40 | 12 | 8 |
What size fuse do I need for 18 gauge wire?
18 gauge wire is a max of 4.8 amps so I wouldn’t go over a 4 amp fuse otherwise the wire would just melt and could cause a fire.
Is 14 gauge wire OK for a 20-amp circuit?
So yes, a 14 gauge wire will safely carry 20 amps, no problem. mixing 14-gauge NM and 12-gauge. both 14 and 12 gauge will be protected by a 15A breaker. Code states that 14Ga will be protected by an overcurrent device of not more than 15A and 12GA by 20A.
Can I use 12 gauge wire on a 20-amp circuit?
As a general rule, 12-gauge wire can safely employ 10 receptacles on a 20-amp circuit using copper wire. By comparison, 14-gauge wire can handle 15 amps and 8 receptacles.