Wire Sizing ની ગણતરી કેવી રીતે કરવી
Wire Sizing શું છે?
Wire sizing selects conductor diameter to limit voltage drop and prevent overheating. Code requires ampacity matching and voltage drop limits.
સૂત્ર
Calculate voltage drop: VD = (2×K×I×L) / (1000×A) for DC or single-phase
- VD
- (2×K×I×L) / (1000×A) for DC or single-phase — (2×K×I×L) / (1000×A) for DC or single-phase
- K
- K value — Variable used in the calculation
- I
- I value — Variable used in the calculation
- L
- L value — Variable used in the calculation
- A
- A value — Variable used in the calculation
- DC
- DC value — Variable used in the calculation
પગલું દ્વારા પગલું માર્ગદર્શિકા
- 1Look up ampacity from tables at operating temperature
- 2Calculate voltage drop: VD = (2×K×I×L) / (1000×A) for DC or single-phase
- 3Select wire where VD <3% feeder, <5% combined
Worked Examples
ઇનપુટ
I = 100 A, L = 50 m, copper wire, assume 60°C ampacity table
પરિણામ
AWG 6 (106 A) with ~3.1% drop, marginal
AWG 4 better choice
Common Mistakes to Avoid
- ✕Using listed ampacity without derating for temperature or bundling
- ✕Neglecting voltage drop in long feeder runs
Frequently Asked Questions
Why limit voltage drop?
Excessive drop reduces equipment performance, efficiency, and motor starting capability.
How does temperature affect wire sizing?
Higher temperature reduces ampacity; must derate if ambient >30°C.
ગણતરી માટે તૈયાર છો? મફત Wire Sizing કેલ્ક્યુલેટર અજમાવી જુઓ
તેને જાતે અજમાવી જુઓ →