DIPLOMA ELECTRICAL ENGINEERING DRAWING



SOME BASIC SYMBOL 







   Full From




 -VIR. Vulcanised Indian rubber

- PVC.  Poly- vinyl chlorid

- TRS. Tough rubber sheathed

- ACSR. Aluminium conductor steel rein- inforced conductor
- DPIC . Double pole iron clad
- MCB.  Miniature circuit breaker
- VCB. Vacuum circuit breaker
- ACB. Air circuit breaker
- ELCB. Earth leakage circuit breaker
- DP MCB. Double pole miniature circuit breaker
- SWG.  Standard wire gauge
- DB. Distribution board
- SB. Switch board
- MDB. Main distribution board
- ICSB. Iron clad switch board
- HRC. High rupturing capacity
- MCCB. Moulded case circuit breaker
- CCC. Contactor control circuit
- NO. Normally open
- NC. Normally close
- CR. Current relay
- TDR. Time delay relay
- CT. Current transformer
- DOL.  Direct on line starter 
- PT. Potential transformer
- CPT. Capacitive potential transformer




                      CIRCUIT DIAGRAM
(1).  One lamp control by two switch

(2). Two bell control by three switch
                 
(3).  Bell response circuit by using one bell           and relay
              
(4). Fluorescent
   

More diagram update soon..