ELECTRICAL SYMBOLS – Indicators and Alarms

                          Indicator and Alarm Symbols Meaning

bell indicator Bell, electric
Buzzer Buzzer
Horn icon electic Horn – General
Annunciator icon electric Annunciator – General
Indicating Light blueprint

Indicating Light – General 

Use the following to specify color

  • A – Amber
  • B- Blue
  • C-Clear
  • G-Green
  • Ne-Neon
  • O-Orange
  • OP-Opalescent
  • P-Purple
  • R-Red
  • W-White
  • Y-Yellow

Relay Symbols Meaning

The following methods are used on drawings to identify

Two devices relay  Two (2) 64 devices 64-1 and 64-2 in same cell. 
Three devices delay

Three (3) 27 devices 27-1, 27-2 and 27-3.

The two (2) below the 27-2 device indicates there are two (2) 27 devices and their squence numbers are in numerical order starting with -2.

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