Colors

Example of a wiring diagram.

Wiring diagrams are typically colored with lines representing the following:

•      Red = Control Circuit(s)
•      Blue = Neutral Wire
•      Green = Ground Wire
•      Black/White (varies on background) = Power Source

Symbols

Download Wiring Symbol Chart (PDF, 768.7 KB)

Symbol	Description
	Auto-Off Selector Switch
	Auto-Off-Continuous Selector Switch
	Lead-Off-Lag Selector Switch
	Lead-Off-Lag-Continuous Selector Switch
	Float-Off-Float and Vacuum Continuous Selector Switch
	Disconnect
	Starter, Single-Phase with a Set of Two Overloads
	Starter, Three-Phase with a Set of Three Overloads
	Starter Coil with Three Overloads
	Transformer to Reduce Supply Voltage to 115 volts for Control Circuit Operation
	Relay with Two Normal Open and Two Normal Closed Contacts
	Electric Alternator Alternates Between Two Pumps Equalizing Operation Time
	Single Pole, Single Throw Float Operated Switch to Turn Pumps On and Off
	Double Pole, Single Throw Float Operated Switch to Turn Pumps On and Off
	Pump Motor
	Fuses
	Circuit Breaker
	Alarm Bell for Use with High and Low Water Conditions
	Low Water Cut-Off Switch, Normally Closed for Use with Electrical Panel with One Transformer
	Low Water Cut-Off Switch, Normally Open for Use with Electrical Panel with Two Transformers
	Pilot Light to Indicate Power On or System Operation
	Terminal Block
	Float Switch and Solenoid for Adding Make-up Water
	Vacuum Switch
	Temperature Limit Switch
	End Switch
	Mechanical Alternator, Mechanically Alternates Between Two Pumps to Equalize Operation Time
	Push Button for Momentary Make of Electrical Circuit. Used as Test Button or Push to Silence in Alarm Circuit.