Appendix C - 25x86 Logic Processor Wiring Codes

Appendix C - 25x86 Logic Processor Wiring Codes

Industry Standards

Table C-1 lists the wiring codes required to satisfy safety specifications.

Table C-1 Industry Standard Wire Codes

	Function	Color	Abr.	AWG (min.)
120V AC Input	neutral line (hot) ground ground	white black green green/yellow	WHT BLK GRN GRN/YEL	14 14 14 14

Green or green with yellow stripe must be used only for non current-carrying ground.

HSQ Standards

Table C-2 lists the wiring codes used in production, fieldwork and testing.

Table C-2 HSQ Standard Wire Codes

	Function	Color	Abr.	AWG (min)
DC Power	+24 Vdc 24 V return (common) +5 Vdc 5 V return (signal common)	red black orange tan	RED BLK ORN TAN	18 18 18 18
Operations Monitor	Relay, normally. closed Relay, normally open	blue purple	BLU PUR	18 18
Power Control	AC OK status Battery off command	brown gray	BRN GRY	18 18

Maximum Current Capacities

Table C-3 lists the maximum RTU wire current-carrying capacities as specified by the American Wire Gage National Electric Code ANSI/NFPA 70-1987 Articles 310-16, for type THHN (90C) 600V @ 60C [general wiring] and 725-16 & 402-5 for class 1, 2 or 3 remote signaling equipment.

Table C-3 - Wire Capacities

AWG (max.)	Amps	Breaker
18	6	5
16	8	----
14	17.75	15
12	21.3	20
10	28.4	30
8	39	----