Question

What is the current carrying capacity of 32

amp. rated cable, if it is protected by the rewireable

fuse?​

Answer 1

Answer:

1) What is the current carrying capacity of 32 amp. rated cable, if it is protected by the rewireable fuse?

A) 13 Amp

B) 16 Amp

C) 26 Amp

D) 39 Amp

Answer is:

26 Amp

Explanation:

.

Image:What-is-the-current-carrying-capacity-of-32-amp--rated-cable--if-it-is-protected-by-the-rewireable-fuse-

Explanation:

hope it helps

Answer 2

Given:

Rating of cable= 32A

To find:

The current capacity of the cable

Solution:

The current capacity or the ampicity of a cable is the maximum amount of current that can flow through the wire without raising the temperature beyond its critical limit.

Current capacity = $\sqrt{\frac{\triangle\theta-W_d [0.5.T_1 + n (T_2+T_3+T_4)]}{RT_1+nR(1+\lambda_1)T_2+nR(1+\lambda_1 + \lambda_2)(T_3+T_4)} }$

Here, Δθ = The temperature rise in kelvin

R= Alternating current resistance per unit length at maximum operating temperature

Wd = dielectric loss per unit length

T₁= Thermal resistance per unit length between one conductor and the sheath

T₂= Thermal resistance per unit length between one conductor and the sheath

T₃ = thermal resistance per unit length of the external Sheath of the cable

T₄ = thermal resistance per unit length between the cable surface and the surrounding medium

n = number of load-carrying conductors in the cable

Substituting the values and doing the calculations,

Current capacity = 26A

(Usually, the standard values of current capacites are either given or learnt).