3 |
Nonincendive Field Wiring Control Drawing
Hazardous (Classified) Location
Class I, Division 2 Groups A, B, C, and D
Front USB Port on Computer No._________________
Nonincendive Field Wiring Apparatus
Vmax
Imax
Ci
Li
Associated Nonincendive
Field Wiring Apparatus
(Computer)
Voc
Isc
Ca
La
Notes:
1. Nonincendive Circuit Parameters:
Voc = 4.969 VDC
Isc = 2.06 A
Ca = 75 µF
La = 40 µH
2. Selected Nonincendive Field Wiring Apparatus shall satisfy the following:
Voc | ≤ | Vmax |
Isc | ≤ | Imax |
Ca | ≥ | Ci + C cable |
La | ≥ | Li + L cable |
3.If the electrical parameters of the cable are unknown, the following values may be used:
Capacitance – 60 pF/ft Inductive – 0.20 µH/ft
4.Nonincendive Field Wiring must be installed in accordance with Article 501.4(B)(3) of the National Electrical Code ANSI/NFPA 70.
5.Selected Nonincendive Field Wiring Apparatus must not be connected to external power source.
Chapter 3 Installation |