Fail Safe | Honeywell MS4103 guide

Control Ball Valves ½- 3"

2-Way NPT NEMA 2

		Actuator Features				Fail Safe

		Actuator O.S. Number			MS8105A1030	MS8105A1030	MS7505A2030	MS7505A2030	Valve Only	Valve Only

		Power Supply		Voltage	24 Vac	24 Vac	24 Vac	24 Vac
				Frequency	50 / 60 Hz	50 / 60 Hz	50 / 60 Hz	50 / 60 Hz
				Power	8VA	8VA	7.5 VA	7.5 VA
		Actuator Torque		(lb.-in.)	44	44	44	44
		Control		(0)2-10 Vdc			•	•
		4-20 mA (external 500 Ohm Resistor)					•	•
				Floating			•	•
				Two-Position SPDT			•	•
				Two-Position SPST	•	•	•	•
		Fail Safe Action			Closed*	Closed*	Closed*	Closed*
		Normal Position (no signal)			Closed*	Closed*	Closed*	Closed*
		Actuator Stroke		(degrees)	95° ± 3°	95° ± 3°	95° ± 3°	95° ± 3°
		Timing		(seconds)	45	45	90	90
		Aux Switch		2 x SPDT Add-on
		Feedback		2-10 Vdc Built In			•	•
		Valve Features		Trim	Nickel-Plated Brass	Stainless Steel	Nickel-Plated Brass	Stainless Steel	Nickel-Plated Brass	Stainless Steel
	Valve Size	Cv		Close-off			Valve O.S. Number
	(inches)	Cv		Differential Pressure (psi)			Valve O.S. Number
	(inches)			Differential Pressure (psi)
		0.38			vbn2ab3P0C	vbn2ab3s0C	vbn2ab3P0d	vbn2ab3s0d	vbn2ab3P0X	vbn2ab3s0X
		0.68			vbn2ad3P0C	vbn2ad3s0C	vbn2ad3P0d	vbn2ad3s0d	vbn2ad3P0X	vbn2ad3s0X
		1.3			vbn2ae3P0C	vbn2ae3s0C	vbn2ae3P0d	vbn2ae3s0d	vbn2ae3P0X	vbn2ae3s0X
	1/2"	2			vbn2aF3P0C	vbn2aF3s0C	vbn2aF3P0d	vbn2aF3s0d	vbn2aF3P0X	vbn2aF3s0X
	1/2"	2.6			vbn2ag3P0C	vbn2ag3s0C	vbn2ag3P0d	vbn2ag3s0d	vbn2ag3P0X	vbn2ag3s0X
		2.6			vbn2ag3P0C	vbn2ag3s0C	vbn2ag3P0d	vbn2ag3s0d	vbn2ag3P0X	vbn2ag3s0X
		4.7			vbn2aH3P0C	vbn2aH3s0C	vbn2aH3P0d	vbn2aH3s0d	vbn2aH3P0X	vbn2aH3s0X
		8			vbn2aJ3P0C	vbn2aJ3s0C	vbn2aJ3P0d	vbn2aJ3s0d	vbn2aJ3P0X	vbn2aJ3s0X
		11.7*			vbn2ak3P0C	vbn2ak3s0C	vbn2ak3P0d	vbn2ak3s0d	vbn2ak3P0X	vbn2ak3s0X
		0.31		130	vbn2bb3P0C	vbn2bb3s0C	vbn2bb3P0d	vbn2bb3s0d	vbn2bb3P0X	vbn2bb3s0X
		0.63			vbn2bd3P0C	vbn2bd3s0C	vbn2bd3P0d	vbn2bd3s0d	vbn2bd3P0X	vbn2bd3s0X
		1.2			vbn2be3P0C	vbn2be3s0C	vbn2be3P0d	vbn2be3s0d	vbn2be3P0X	vbn2be3s0X
		2.5			vbn2bg3P0C	vbn2bg3s0C	vbn2bg3P0d	vbn2bg3s0d	vbn2bg3P0X	vbn2bg3s0X
	3/4"	4.3			vbn2bH3P0C	vbn2bH3s0C	vbn2bH3P0d	vbn2bH3s0d	vbn2bH3P0X	vbn2bH3s0X
		7.4			vbn2bJ3P0C	vbn2bJ3s0C	vbn2bJ3P0d	vbn2bJ3s0d	vbn2bJ3P0X	vbn2bJ3s0X
		10.1			vbn2bk3P0C	vbn2bk3s0C	vbn2bk3P0d	vbn2bk3s0d	vbn2bk3P0X	vbn2bk3s0X
		14.7*			vbn2bl3P0C	vbn2bl3s0C	vbn2bl3P0d	vbn2bl3s0d	vbn2bl3P0X	vbn2bl3s0X
		29*			vbn2bM3P0C	vbn2bM3s0C	vbn2bM3P0d	vbn2bM3s0d	vbn2bM3P0X	vbn2bM3s0X
		4.4			vbn2CH3P0C	vbn2CH3s0C	vbn2CH3P0d	vbn2CH3s0d	vbn2CH3P0X	vbn2CH3s0X
		9			vbn2CJ3P0C	vbn2CJ3s0C	vbn2CJ3P0d	vbn2CJ3s0d	vbn2CJ3P0X	vbn2CJ3s0X
	1"	15.3			vbn2Cl3P0C	vbn2Cl3s0C	vbn2Cl3P0d	vbn2Cl3s0d	vbn2Cl3P0X	vbn2Cl3s0X
	1"	26			vbn2CM3P0C	vbn2CM3s0C	vbn2CM3P0d	vbn2CM3s0d	vbn2CM3P0X	vbn2CM3s0X
		26			vbn2CM3P0C	vbn2CM3s0C	vbn2CM3P0d	vbn2CM3s0d	vbn2CM3P0X	vbn2CM3s0X
		44*			vbn2Cn3P0C	vbn2Cn3s0C	vbn2Cn3P0d	vbn2Cn3s0d	vbn2Cn3P0X	vbn2Cn3s0X
		54*			vbn2CP3P0C	vbn2CP3s0C	vbn2CP3P0d	vbn2CP3s0d	vbn2CP3P0X	vbn2CP3s0X
		4.4			vbn2dH3P0C	vbn2dH3s0C	vbn2dH3P0d	vbn2dH3s0d	vbn2dH3P0X	vbn2dH3s0X
Way		8.3			vbn2dJ3P0C	vbn2dJ3s0C	vbn2dJ3P0d	vbn2dJ3s0d	vbn2dJ3P0X	vbn2dJ3s0X
		14.9			vbn2dk3P0C	vbn2dk3s0C	vbn2dk3P0d	vbn2dk3s0d	vbn2dk3P0X	vbn2dk3s0X
	1-1/4"	25			vbn2dl3P0C	vbn2dl3s0C	vbn2dl3P0d	vbn2dl3s0d	vbn2dl3P0X	vbn2dl3s0X
2-		37			vbn2dM3P0C	vbn2dM3s0C	vbn2dM3P0d	vbn2dM3s0d	vbn2dM3P0X	vbn2dM3s0X
		41*			vbn2dn3P0C	vbn2dn3s0C	vbn2dn3P0d	vbn2dn3s0d	vbn2dn3P0X	vbn2dn3s0X
		102*			vbn2ds3P0C	vbn2ds3s0C	vbn2ds3P0d	vbn2ds3s0d	vbn2ds3P0X	vbn2ds3s0X
		23			vbn2el3P0C	vbn2el3s0C	vbn2el3P0d	vbn2el3s0d	vbn2el3P0X	vbn2el3s0X
		30			vbn2eM3P0C	vbn2eM3s0C	vbn2eM3P0d	vbn2eM3s0d	vbn2eM3P0X	vbn2eM3s0X
	1-1/2"	41			vbn2en3P0C	vbn2en3s0C	vbn2en3P0d	vbn2en3s0d	vbn2en3P0X	vbn2en3s0X
		74*			vbn2er3P0C	vbn2er3s0C	vbn2er3P0d	vbn2er3s0d	vbn2er3P0X	vbn2er3s0X
		172*		100	vbn2e13P0C	vbn2e13s0C	vbn2e13P0d	vbn2e13s0d	vbn2e13P0X	vbn2e13s0X
		42		100	vbn2Fn3P0C	vbn2Fn3s0C	vbn2Fn3P0d	vbn2Fn3s0d	vbn2Fn3P0X	vbn2Fn3s0X
		42			vbn2Fn3P0C	vbn2Fn3s0C	vbn2Fn3P0d	vbn2Fn3s0d	vbn2Fn3P0X	vbn2Fn3s0X
		57			vbn2FP3P0C	vbn2FP3s0C	vbn2FP3P0d	vbn2FP3s0d	vbn2FP3P0X	vbn2FP3s0X
		71			vbn2Fr3P0C	vbn2Fr3s0C	vbn2Fr3P0d	vbn2Fr3s0d	vbn2Fr3P0X	vbn2Fr3s0X
	2"	100			vbn2Fs3P0C	vbn2Fs3s0C	vbn2Fs3P0d	vbn2Fs3s0d	vbn2Fs3P0X	vbn2Fs3s0X
		108*			vbn2Ft3P0C	vbn2Ft3s0C	vbn2Ft3P0d	vbn2Ft3s0d	vbn2Ft3P0X	vbn2Ft3s0X
		210			vbn2F13P0C	vbn2F13s0C	vbn2F13P0d	vbn2F13s0d	vbn2F13P0X	vbn2F13s0X
		266*			vbn2F23P0C	vbn2F23s0C	vbn2F23P0d	vbn2F23s0d	vbn2F23P0X	vbn2F23s0X
		45			vbn2gn3P0C	vbn2gn3s0C	vbn2gn3P0d	vbn2gn3s0d	vbn2gn3P0X	vbn2gn3s0X
		55			vbn2gP3P0C	vbn2gP3s0C	vbn2gP3P0d	vbn2gP3s0d	vbn2gP3P0X	vbn2gP3s0X
	2-1/2"	72			vbn2gr3P0C	vbn2gr3s0C	vbn2gr3P0d	vbn2gr3s0d	vbn2gr3P0X	vbn2gr3s0X
	2-1/2"	101			vbn2gs3P0C	vbn2gs3s0C	vbn2gs3P0d	vbn2gs3s0d	vbn2gs3P0X	vbn2gs3s0X
		101			vbn2gs3P0C	vbn2gs3s0C	vbn2gs3P0d	vbn2gs3s0d	vbn2gs3P0X	vbn2gs3s0X
		162			vbn2gu3P0C	vbn2gu3s0C	vbn2gu3P0d	vbn2gu3s0d	vbn2gu3P0X	vbn2gu3s0X
		202*			vbn2g13P0C	vbn2g13s0C	vbn2g13P0d	vbn2g13s0d	vbn2g13P0X	vbn2g13s0X
		49			vbn2Hn3P0C	vbn2Hn3s0C	vbn2Hn3P0d	vbn2Hn3s0d	vbn2Hn3P0X	vbn2Hn3s0X
		63			vbn2HP3P0C	vbn2HP3s0C	vbn2HP3P0d	vbn2HP3s0d	vbn2HP3P0X	vbn2HP3s0X
	3"	82			vbn2Hr3P0C	vbn2Hr3s0C	vbn2Hr3P0d	vbn2Hr3s0d	vbn2Hr3P0X	vbn2Hr3s0X
		124			vbn2Ht3P0C	vbn2Ht3s0C	vbn2Ht3P0d	vbn2Ht3s0d	vbn2Ht3P0X	vbn2Ht3s0X
		145*			vbn2Hu3P0C	vbn2Hu3s0C	vbn2Hu3P0d	vbn2Hu3s0d	vbn2Hu3P0X	vbn2Hu3s0X

Full port ball. No flow characterizing insert.

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Image 29

Honeywell MS4103 manual Fail Safe, Vbn2dn3P0d Vbn2dn3s0d Vbn2dn3P0X Vbn2dn3s0X

Contents

Dampers, Actuators and Valves Butterfly & Flanged Control Ball Valve Ordering How to use this guide Fire and Smoke Resilient Seat Butterfly Valves DampersControl Valve Applications MS8105 Accessories Section Page Fire and Smoke Determining Damper Actuator Torque Requirements Damper And Actuator SizingDetermine Damper Actuator Locations Approximate industry standard damper lb-in. per sq ft value Damper Sizing Standard Rectangular Dampers Standard Round Dampers Direct coupled actuators quick selection guide Direct Coupled Actuators Order Specification SpecificationOrder Approximate VA Rating Lb-in 3.4 Nm Fire & Smoke ActuatorsLb-in Lb-in 20 Nm Valve Selection Page Control Valve Applications Way Control Valve Selection Criteria Stem down to close Stem up to close Globe Control Ball Butterfly 230 psi Port specificationAB porting AB-B porting Control Valve Selection Criteria Maximum static water pressure 300 psig Fan Coil and Zone ValvesWay Actuator O.S. Number Maximum Timing Leadwire Length, Way Way Mixing/ Diverting Cartridge Cage Valves For all working parts Flush-and-fill manual lever on all actuators Cartridge Globe Valves Pipe Fail Safe PneumaticFloating 02-10 Vdc Way NPT Nema Control Ball Valves ½ Vbn2dn3P0d Vbn2dn3s0d Vbn2dn3P0X Vbn2dn3s0X Fail Safe 02-10 Vdc MA external 500 Ohm Resistor Floating Way NPT Nema 3RClose-off Vbn2ab3sRa Vbn2dn3sRd Valve Size Inches Actuator Features Non-fail Safe Fail SafeControl Ball Valves ½- 2½ Control Ball Valves ½- 2½ Flanged Control Ball Valves 4 Actuator Features Non-fail Safe Fail Safe Valve OnlyWay Flanged Nema 2+3R To 5 80% of Cv on B-port With Dedicated Valve Actuators NPT Globe Valves ½Valve Valve OS Close-off Pressure, psid Number 240 psi Ansi body classWay water valves 15 psi Maximum steam pressure Way steam valves, 337F 100 psi Stem travel With Direct Coupled Actuators and Valve Linkage Actuator Features Non-Fail SafeValve Valve OS V5013N1071 V5013N1089 V5013N1097 Valve OS Close-off Pressure, psid Spdt Built Valve Max Static LVaevSelection Max Static Max Steam Flow Flanged Globe Valves 2½250 Psi @ 130 F Psig / 353 F Linear 125 Actuator Features Actuator Features Fail Safe Characteristic Action With Tandem Direct Coupled Actuators and Valve Linkage Threaded and Flanged Globe Valves 2Body material Bronze V5011/13N, Cast iron Cast Iron VGF3 Q5022A1001 Required 100 125 Diverting 175V5013B1003 Actuator O.S. Number Power Supply LVaevSelection Standard Psi @ 130 F Equal % Flanged Globe Valves 4 Close-off Pressure, psid Flow Valve Valve OS Close-off Pressure, psid Max Static Max SteamStandard Action Flow characteristic Modified linearFlanged Cage Valves 2½ With Pneumatic Actuators Chart HRolling diaphragm for long life Low hysteresis To the valve Chart C Chart aChart B Chart G With Positive Positioner Close-off Pressure See Charts On10psi span Inch Direct Acting Pneumatic Actuator Chart H Chart J Chart K Constant Total Stem up closes B-AB V5013C1019 SteamMax Steam Flow Valve Chart S Stem PSI kPa Close-off Pressure See Charts OnWay Water & Steam Valves Way Water Valves Chart T ChartChart W Way Electrically-Actuated Control Resilient Seat Butterfly ValvesOpen Normally Field Lever Way Normally Closed Field-Configurable Normally OpenBuilt Add-On Common PortingValve Use a pair Valve O.S. Number Diverting VFF6 A-AB-B porting, full-cutVFF6 may be piped for mixing Control with water exiting port AB Resilient Seat Butterfly Valves Way Pneumatically-Actuated Control Spring Positioner Standard OpenPsi Actuator Psi spring return Cv @ 1081 3316 567 1850 PortMixing Page Pneumatic Damper Actuator MP909D MP909E, H MP913 MP918A, B Temperature Rating Rectangular Volume Control DampersD1 Series Performance Data D1 Pressure and Velocity Limits Performance Data D2, D3 Pressure and Velocity Limits D2 and D3 Series Type of Blade Round Volume Control DampersD690 DM7600 Rated Torque Spring Return Direct Coupled ActuatorS03 Series MS4103 MS7403 MS7503 MS8103 S05 Series MS4105 MS7105 MS7405 MS7505 MS8105 S10 Series MS4110 MS7510 MS8110 S20 Series MS4120 MS7520 MS8120 NEMA1 ML4125 ML8125 ML4135 ML8135 ML6161 ML7161 Non-Spring Return Direct Coupled Actuator ML6174 ML7174 N05 Series MN6105 MN7505 N10 Series MN6110 MN7510 NEMA2 IP54 N20 Series MN6120 MN7220 N34 Series MN6134 MN7234 ML4115 ML8115 Fire And Smoke ActuatorSupply Voltage Materials Integral junction box with three MS4209F MS4309F MS4709F MS4809F MS8209F MS8309F MS4120F MS4620F MS8120F Pneumatic Damper Actuator Temperature RangeMP909D DIA 13 5-11/16 145 1-3/16 Actuator with Fixed External Mounting Bracket MP909E,HActuator with Internal N.C. Trunnion Mounting Bracket Actuator with External Trunnion Mounting Bracket MP913 100 MP918A,BActuator with Internal N.O. Trunnion Mounting Bracket 101 MP920 102 Pneumatic Valve ActuatorMP953C,D 103 MP953E,F 104 MP9584 DIA IN. MM In. NPT M4185 M8185 Modutrol IV Motor105 Shaft Shape 106 M6184 M6194 M6285 for slaving applications 108 M6284 M6294 for slaving applications 109 M6274 M6284 M6285 M6294 Motors with Linear 10K Feedback 110 M7164 111 M7274 M7284 M7285 M7286 M7294 112 M9164 M9174 M9182 M9184 M9194 113 M9175 M9185 M9186 Q7130 Q7230 Q7330 VU443, VU444 VU843 VU844 Unitary Valve Actuator115 11/16 VC Series Two-position Actuators 117 VC Series Proportional Actuators VC Series Fail Safe Proportional Actuators 119 M6410 M7410Visual position indication red pin 120 M6435 M7435Visual position indication red disk 121 Direct Coupled Valve ActuatorML6420 ML7420 122 ML6421 ML7421 123 Stem down on power failure orML6425 ML7425 ML6984 125 ML7984 VU52 VU53 Unitary Valve126 Valve Type 127 VU54 Stem Travel Vcza Vczb 129 Vczm Vczn 130 V5852 131 V5853 132 Control Ball Valve 133 VBN3 134 VBF2 135 VBF3 136 NPT Globe ValveV5011F,G 137 V5011N 138 V5013N 139 Flanged Cage ValveV5051A 140 Flanged Globe ValveV5011A,B 141 V5013B,C Actuators with Q5020 valve MN/MS Series Direct CoupledLinkage 142 Valve Action VGF2 Pressure Balanced143 144 VGF3 145 VFF1 146 VFF2 147 VFF3 148 VFF6 149 Damper LinkageQ605 150 Valve LinkageQ5001 151 Globe Valve LinkageQ5020 Q5022 153 Wiring for line-voltage two-position control Actuator Wiring DiagramsWiring for 02-10 VDC proportioning controllers Wiring for Spdt on/off Control Direct Coupled Actuators Spring Return Models Wiring for 3 position Economizer controllersOverride to full close 155 156 Wiring for On/Off ControlWiring for Floating Control Floating mode setting Override to full closed Modulating mode setting Override to full open Modulating mode settingTerminal Block Details 157 158 Typical 24 Vac wiring Typical 230 Vac WiringTypical 120 Vac Wiring ML7161 used with 4-20 mA control ML6174 and ML7174ML7174 used with 4-20 mA control 159 Wiring for Auxiliary Switches Wiring for Floating Control Wiring for Voltage Control160 MN6105, MN6110 161 Used for On/Off Control Wiring for Floating ControlWiring for Modulating Control Wiring for 120V Control Wiring for 24V ControlMS4120F, MS4620F, and MS8120F 162 Foot Mounted Motors M4185 and M8185M6184 and M6194 M6284, M6285, and M6294 for slaving applications Typical wiring for M7685 motors Typical wiring for Series 70 motorsM7164, M7284, M7285, M7286, and M7294 M7685 165 Typical wiring for Series 90 motorsWiring for Potentiometer Control 166 Typical Non-Spring Return 120 Vac Floating control wiringActuators with Butterfly Valves VFF2, VFF3, and VFF6 Typical Spring Return 2-Position, 24 Vac wiring Typical Non-Spring Return Modulating control wiringActuators with Butterfly Valves 167 168 169 170 Guide SpecificationsThreaded Globe Valves 171 Pressure-Balanced Flanged Globe Valves 172 Flanged Globe Valves 173 Threaded Control Ball Valves and Actuators 174 Control Ball Valves and Actuators 175 Flanged Butterfly Valves and Actuators 176 Fan Coil Zone Valves and Dedicated Actuators 177 Cartridge Cage Valves and Dedicated Actuators 178 Cartridge Globe Valves and Dedicated Actuators 179 Electric Large Linear Globe Valve Actuators 180 Direct-Coupled Electronic Globe Valve Actuators 181 Direct-Coupled Rotary Actuator Globe Valve Linkage 182 Tandem Direct-Coupled Rotary Actuator Globe Valve Linkage 183 Footmount Globe Valve Actuators 184 185 Control, Positioning, Feedback Accessories Damper And Actuator AccessoriesBall Joints, Push Rod Accessories 32003532-005 Mounting Accessories32006306-001 205649 Rotational Limiters, Position Indicators Crankarms Shaft Adaptor Accessories Q7002 Interface Modules Enclosure AccessoriesMiscellaneous Accessories Accessories for Obsolete Actuators VU Series Fan Coil Actuator Accessories Valve AccessoriesValve Actuator Accessories Pneumatic Damper Actuator Parts and Accessories Pneumatic Damper Accessories 14004264-002 14004264-00114004324-001 14004350-001 314503 314440A315321 315321G Pneumatic Valve Actuator Parts and Accessories Pneumatic Valve Accessories 311852 311851/0062311855 311863 Foot Mounted Motor Accessories Foot Mounted Motor Accessories203709D2 220738A 4074ERU 221508A27617DM ES-650-117 Damper and Valve Linkage Accessories Damper And Valve Accessories Way Valve + Non-Spring Return Modulating Actuator Way Valve + Non-Spring Return Floating ActuatorWay Valve + Spring Return, 2-Position Actuator Way Valve + Spring Return Floating Actuator 202 Competitive Cross ReferenceDirect Coupled Actuator 203 204 Sec Actuator Lb-in Signala ±20% 25-85 205 Johnson Torque Control Timing Honeywell Switches Sec Actuator Lb-in Signala Power206 207 Switches Sec Actuator Lb-in Signala 208 209 210 211 Invensys Torque Control Timing Honeywell Lb-in Signala212 213 1kOhm 214 Lb-in Signala Power Switches215 Siemens Torque Control Timing Honeywell + SW2 34 Nm Floating 21634 Nm Floating 200976C 217+ SW2 34 Nm 218 219 220 Control Ball Valve Cross ReferenceWay Valve 221 Way Valve + Non-Spring Return Floating Actuator 222 Way Valve + Non-Spring Return Modulating Actuator 223 Way Valve + Spring Return, 2-Position Actuator 224 Way Valve + Spring Return Floating Actuator 225 Way Valve + Spring Return Modulating Actuator 226 Globe Valve Cross Reference 227 228 Pneumatics Cross Reference 229 230 231 Modutrol IV Motor Cross Reference 232 233 234 235 236 237 238 239 240 241 242 243 Definitions Appendix a Valve Selection and SizingIntroduction 0000240 C Within the temperature range865 C Pascals Ansi Butterfly Valve Ball Valve Iron or Steel Component Corrosive Substance Corrosion Color Valve Material and Media 249 Valve Selection 250 Two-Way Valve Application Linear vs. Nonlinear System Control Flow vs. Stem Travel Characteristic of a Quick Opening Valve 252 30% open Gpm 10% increase 40% open 60% increase 50% open 253 Valve SizingMixing valve application has a maximum pressure Pressure Drop Correction for Propylene Glycol Solutions Pressure Drop Correction for Ethylene Glycol Solutions Conditions of temperature = the specific volume of air at standardFor hot water coil valves Where 256 Substituting 257 Effect of Pressure Drop in Hot Water Valve Sizing Pressure drop in psi Scaling constantSuperheat in degrees F For sizing steam coil valves At Room Termperature At 65 F Inlet Air Temperature When sizing steam jet humidifier valvesSimplifying Fices use Negative value if a vacuum return PressurePsig Pressure in return is atmospheric 261 = 80% x Pm PrIn. Hg = 0.49 psi and 1 psi = 2.04 in. Hg Properties of Saturated Steam Boiling Point or Volume For valveMaximum Specific Allowable Inches 263 Appendix B Nema Standard Classification Code for Enclosures Shielded Wiring 265 266 Warranty Policy Automation and Control Solutions