Hi!
I like to know the difference between single and double pole isolators. Thank you.
I like to know the difference between single and double pole isolators. Thank you.
ISOLATORS
- Thread starter 1957
- Start date
Sponsored Links
- Joined
- 1 Jan 2009
- Messages
- 254
- Reaction score
- 2
- Country
Single Pole breaks the line conductor only, Double Pole breaks line and neutral.
- Joined
- 1 Jan 2009
- Messages
- 254
- Reaction score
- 2
- Country
Would depend on the application and your local wiring regulations.
Sponsored Links
Then what is the difference from two pole to three pole isolator?
Then in residential it is advisable to have a double pole isolator?
- Joined
- 1 Jan 2009
- Messages
- 254
- Reaction score
- 2
- Country
Triple Pole are used where there are three live conductors to break. If an item requires Isolation and not switching then yes i would advise that all live conductors are broken with a suitable device(subject to local wiring regs of course) The neutral is classed as a live conductor and even with the line side isolated could still have voltage present.
- Joined
- 27 Jan 2008
- Messages
- 25,093
- Reaction score
- 2,919
- Location
- Llanfair Caereinion, Nr Welshpool
- Country
In USA from what we are lead to believe you have a number of systems never used in UK.
We use 230v derived from a three phase system which always includes a neutral.
However you use split phase, and hot wire 110v systems and as a result the requirement are likely very different as far as isolation is concerned.
I think you would be far better finding a USA forum to ask your questions as we could easy give you wrong answers here because of different systems.
We have single, twin, triple, and quadruple isolators. First two used on single phase and last two on three phase. We have two main earthing systems one combines the neutral and earth in part of the system and as a result we don't in theory need to switch the neutral with an isolator. But the other system uses earth rods and here there may be big difference between earth and neutral so we do need to switch the neutral.
Since you use a split phase system it is unlikely you could use single isolators and likely both twin and triple are used with your system on single phase.
Also you tend to use more transformers than us yours being pole mounted where we tend to use building to house them so likely the earth system is not as good. Also you country tends to be dryer so that will also effect the earth.
So I would ask your question on a USA forum.
We use 230v derived from a three phase system which always includes a neutral.
However you use split phase, and hot wire 110v systems and as a result the requirement are likely very different as far as isolation is concerned.
I think you would be far better finding a USA forum to ask your questions as we could easy give you wrong answers here because of different systems.
We have single, twin, triple, and quadruple isolators. First two used on single phase and last two on three phase. We have two main earthing systems one combines the neutral and earth in part of the system and as a result we don't in theory need to switch the neutral with an isolator. But the other system uses earth rods and here there may be big difference between earth and neutral so we do need to switch the neutral.
Since you use a split phase system it is unlikely you could use single isolators and likely both twin and triple are used with your system on single phase.
Also you tend to use more transformers than us yours being pole mounted where we tend to use building to house them so likely the earth system is not as good. Also you country tends to be dryer so that will also effect the earth.
So I would ask your question on a USA forum.
