This article is about Electrical Symbols of Lighting Panels, Electrical Symbols of Receptacle Outlets, Toggle Switches and Electrical Symbols of Welding and Power Receptacles.
Electrical Standard Symbols
Lighting Panels, Conduits and Fixtures Symbols:
Following is Electrical Symbols of Lighting Panels, Conduits and Fixtures:
 | Represents Lighting Panels as per contract drawing like LP-A, LP-B etc. |
 | Power Panel – Designated as PP-A, PP-B, etc. Description as per Contract Drawing. |
 | All other panels description as per contract drawings. |
 | Denotes Home Run of circuits 2,4,6 and N to lighting panel A. Denotes Neutral Wire. Show Hot and Current Carrying Wire |
 | Show Installation as per Standard document. Here Lighting Details Drawing like L301A. |
 | Shows lighting fixture for general lighting applications. |
 | Shows Fluorescent Lighting Fixture |
 | Shows Floodlighting Fixture |
| A6 | Represents circuit no 6 in lighting panel A. |
| 100, 150 | Represents Lamp Wattage |
| ϕAB | Represent for phase wiring for 480V. |
| E | Emergency Lighting Circuit |
| a | Shows fixture controlled by switch ‘a’ |
Electrical Symbols of Receptacle Outlets:
Here is Electrical Symbols of Receptacle Outlets:
 | SINGLE CONVENIENCE OUTLET, SPECIFICATION GRADE, 15A-125V. A.C. D.C., 3 WIRE, GROUNDING TYPE, BROWN PHENOLIC, BACK & SIDE WIRING TERMINALS, FOR POLARIZED & NON-POLARIZED PLUGS, HUBBELL CAT. NO. 5261 OR EQUAL, MOUNTED IN FD TYPE THREADED CONDULET WITH SUIT- ABLE QUANTITY & SIZE HUBS & GASKETED COVER. |
 | DUPLEX CONVIENIENCE OUTLET, SAME AS ABOVE EXCEPT HUBBELL CAT. NO. 5262 OR EQUAL. |
 | SINGLE CONVIENCE OUTLET, SPECIFICATION GRADE, 15A-25ØV. A.C. D.C., 3 WIRE, GROUNDING TYPE, BROWN PHENOLIC, BACK & SIDE WIRING TERMINALS, HUBBELL CAT. NO. 5661 OR EQUAL, MOUNTED SIMILIAR TO 125V. RECEPTACLE ABOVE. |
| WP | THESE LETTERS ADJACENT TO ABOVE RECEPTACLES INDICATES INSTALLATION TO BE WEATHERPROOF. FD CONDULET OR EQUIVALENT EQUIPPED WITH A GASKETED WEATHERTIGHT COVER PROVIDING PROTECTION TO RECEPTACLE WHEN CORD SET PLUGGED IN, PER NEC ARTICLE 410-57(b). |
| A3 | LETTER & NUMBER ADJACENT TO ABOVE RECEPTACLES INDICATE, PANEL A, CIRCUIT NO. 3. |
 | GROUND FAULT RECEPTACLE, 15A, 125V. A.C., 3 WIRE, GROUNDING TYPE, HUBBELL CAT. NO. GF-5262 OR EQUAL. |
Electrical Symbols of Toggle Switches:
Here is Electrical Symbols of Toggle Switches:
 | Toggle Switch, Single Pole, Brown Handle, 20A-120/277V AC, Back & Side Wiring, UL Listed for Motor Loads Up to 80% Rating & Tungsten Loads Up to 100% Rating. Hubbell Cat No. 1221 or Equal, Mounted in FD Type Threaded Condulet with Suitable Quantity & Size Hubs & Gasketed Cover. |
 | TOGGLE SWITCH, SAME AS ABOVE EXCEPT 3-WAY. |
| WP | The letters adjacent to the above switches indicate that the installation should be weatherproof. The FD condulet shall be equipped with a vapor-tight cover with an external toggle switch operator. |
| a | The lower case letter adjacent to the above switches identifies the lighting fixtures being switched. This is used only where a conflict may occur. |
Electrical Symbols of Welding and Power Receptacles:
Here is Electrical Symbols of Welding and Power Receptacles:
Heavy-Duty Circuit Breaking Receptacle, Weatherproof, 3 Wire, 4 Pole, 600 VAC, 60 Hz. Crouse-Hinds Part No.s as Shown. Provide Plug with Each Receptacle Installed. Plug All Unused Hubs. (For Non-Hazardous Applications Only).
 | 30A RECEPTACLE, SPRING DOOR BACKBOX, FEED-THRU, 1″ HUBS |
 | 60A RECEPTACLE ASSEMBLY, SPRING DOOR W/ ROTATABLE BACKBOX, |
 | 100A RECEPTACLE ASSEMBLY, SPRING DOOR W/ ROTATABLE BACKBOX, |
Heavy Duty Circuit Breaking Receptacle – Weatherproof/Corrosion Resistant NEMA 4X (Krydon), 3 Wire, 4 Pole, 600 VAC, 60 Hz. Crouse-Hinds Part No.s as Shown. Provide Plug with Each Receptacle Installed. Plug All Unused Hubs (for Non-Hazardous Applications Only).
 | 30A RECEPTACLE, SPRING DOOR BACKBOX, FEED-THRU |
 | 60A RECEPTACLE ASSEMBLY, SPRING DOOR W/ ROTATABLE BACKBOX |
 | 100A RECEPTACLE ASSEMBLY, SPRING DOOR W/ ROTATABLE BACKBOX, |
Dead Front Interlocked Receptacle with Factory Sealed Switch. 3 Wire, 4 Pole, 600 VAC, 60 Hz. Crouse-Hinds Part No.s as Shown. Provide Plug with Each Receptacle Installed. External Conduit Seals Are Required. Plug All Unused Hubs. (Class 1, Division 1 and 2, Groups B, C, D).
 | 30A RECEPTACLE, TREADED CAP W/ BACKBOX, FEED-THRU |
 | 60A RECEPTACLE, TREADED CAP W/ BACKBOX, FEED-THRU |
120VAC RECEPTACLE:
CLASS 1, DIVISION 1 & 2 GROUP B, C, D.
FACTORY SEALED – PROVIDE PLUG FOR EACH RECEPTACLE INSTALLED. PLUG ANY UNUSED HUBS. NO EXTERNAL SEALS REQUIRED.
 | DEAD FRONT SFETY CONSTRUCTION RECEPTACLE, 20 AMP, 2 WIRE, 3 POLE, 125 VAC, (2)34″ CONDUIT HUBS (FEED-THRU) |