21-30 USING FLEXIBLE CORD IN CLASS I, DIVISION 1 AND 2 AREAS - 501.140
21-32 WIRING METHODS(CLASS II, DIVISION 1) - 502.10(A)(1)(1), (A)(2), AND (A)(3)
Fundamentals of Class I, Division 2 - Hazardous Areas!
21-34 REQUIREMENTS FOR SEALS AND DRAINS (CLASS I, DIVISIONS 1 AND 2) - 501.15
21-23 WIRING METHODS USED FOR LIMITED FLEXIBILITY (CLASS I, DIVISION 2) - 501.10(B)(2)(1) THRU (7)
21-21 CLASS I, DIVISION 1WIRING METHODS - 501.10(A)(1)(1) THRU (7)
502.10 Wiring Methods Class II Locations
21-36 Class I, Division 1 Boundary - 502.15(A)(4), Ex. 1 & 50115(B)(2) Ex. 1
21-40 TYPES OF SEALING FITTINGS - 501.15(C)(1)
21-55 (c) CLASS I OR II, DIVISION 2 LOCATIONS - 516.5(D)(2) AND FIGURE 516.5(D)(2)
Class 1, Division 2, DO and SS Sensors
21-8 (b) CLASS I, DIVISION 2 - 500.5(B)(2)
CMGT 31040 - Industrial and Hazardous Wiring Methods
Flexible Cables
21-37 CABLE SEALS - 501.15(D)(1), (D)(2) & (D)(3)
Explosion Proof Outlet & Class 1 Div 1 and Class 2 Div 1 - 2 Gang Outlet Box
501.10(A)(1)(6)
21-19 NONINCENDIVE EQUIPMENT (CLASS I, DIVISION 2) - ARTICLE 100, 500.7(F), (G), AND (H)
19-26 SUPPLY CORDS - 440.64
21-35 ENTERING ENCLOSURES - 502.15(B)(1)
