Calculated-industries 5070-A User Guide Uživatelský manuál stáhnout pdf (Strana 45)

44 — electricalc

Pro

GROuND CONDuCTOR WIRE SIZE

You can use single or multiple service entrance conductor(s) to nd

the grounding electrode conductor for AC systems. When using

multiple conductors, the ElectriCalc Pro uses the equivalent Circular

Mils to nd the Grounding electrode conductor (based on NEC

Table 250.66).

Find the Grounding electrode conductor Wire Size required when

2/0 is the largest 3-Phase 75°C Copper service-entrance conductor

being used. What is the equivalent Aluminum size? What is the

equivalent Circular Mils?

KEYSTROKE DISPLAY



1. Enter Wire Size and nd Ground Wire Size:



GRND 4 CU WIRE SIZE

2. Find Aluminum size:



GRND 2 AL WIRE SIZE

3. Find Circular Mils:



CMIL 133,100. WIRE

4. Display NEC Table:



NEC 250.66

* Wire size can also be entered in Circular Mils (e.g.,



enters 133,100 CMILs and displays 4 GRND

Wire Size). If Wire Size is not entered using the



key, the

calculation will be based on the Wire Size stored in the



key.

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 65 66

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Calculated-industries 5070-A User Guide Uživatelský manuál Strana 45