Calculated-industries 5070-B User Guide Instrukcja Użytkownika Pobierz pdf (Strona 33)

32 — electricalc

Pro

Re-Sizing Wire Based on Different Insulation Ratings

What Wire Size is required for a 3Ø, 75°C Copper branch

circuit carrying a load of 260 Amps? What would the Wire Size

be if 90°C Copper is used?

KEYSTROKE DISPLAY



1. Set to 3-Phase:

(3Ø)

3Ø 3 PH

2. Set to 75º C:

(75º)

3Ø 75 3 PH

3. Set to Copper (if necessary):

(Cu/Al)

3Ø 75 Cu 3 PH

4. Enter Amps:



AMPS 260.

5. Find Wire Size:



AWG 300 CU WIRE SIZE

6. Change to 90º C:

(90º)

3Ø 90 Cu AWG 0000 CU WIRE SIZE

Wire Sizing Based on Ambient Temperature

Find the 90°C Copper Wire Size needed to connect a 47,700

Volt-Amp load to a 240 Volt, Single-Phase source. What is

the adjusted Wire Size, if the Ambient temperature rating is

changed from the default 30°C to 20°C?

KEYSTROKE DISPLAY



1. Set to 1-Phase:

(1Ø)

1 Ø 1 PH

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 65 66

Brak uwag

Calculated-industries 5070-B User Guide Instrukcja Użytkownika Strona 33