Mysterious Electrical Symbol

[Gilf]

Hi,

Can any one tell me what the symbols in the red triangle are? What type of breaker are these? or does this simply indicate a terminal?

 

[Besoeker]

Red triangle?

 

[big john]

Looks to me like it just indicates terminals on a 3 pole breaker.

 

[jeremy.zinkofsky]

Who developed the drawing? Did it come from a manufacturer? There is no "official" symbol for a terminal or node and you sometimes see manufacturers stray away from what is common, especially in other countries. My best guess is that it represents a connection point, where a wire or device can be terminated or removed as required.

 

[steve66]

Who developed the drawing? Did it come from a manufacturer? There is no "official" symbol for a terminal or node and you sometimes see manufacturers stray away from what is common, especially in other countries. My best guess is that it represents a connection point, where a wire or device can be terminated or removed as required.

I would agree. It looks like a terminal or lug. One for the ground, one for the neutral, and one on each side of each pole of the breaker.

Edit: It could also indicate field wiring terminations provided by the electrical contractor. On drawings from equipment suppliers, its common to denote the difference between wiring and terminations provided with the equipment, and items the EC provides. If these are factory or shop drawings, look on the drawings for a legend or symbol key.

 

[Gilf]

Red triangle?

I mean the red rectangle

 

[Gilf]

Thanks everyone.

This is a detail of a 400 Hz service bay power supply unit for the cord & plug assembly to be connected to. It was provided as part of the RFP package.

 

[Jraef]

Was there a legend? Often times I see people use the box with an X inside to represent field termination points, as mentioned above.

 

[Besoeker]

Looks to me like it just indicates terminals on a 3 pole breaker.

Or simply a 100A 3-pole circuit breaker. It's about like the symbol we would have used for that.

 

[Phil Corso]

400 Hz is pointing to Aviation-related schematic!

 

[GeorgeB]

Often times I see people use the box with an X inside to represent field termination points, as mentioned above.

With Phillips head (cross point) screws. <BIG GRIN>

 

[Johnnybob]

Looks like a 3 pole 100A CB to me! (with lugs/terminals)

 

[steve66]

With Phillips head (cross point) screws. <BIG GRIN>