NVQ help.
- Thread starter karlpeg
- Start date
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Two opposing sets in the same length of conduit.
Used to go over another conduit or obstruction.
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Used to go over another conduit or obstruction.
[code:1]
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______/ \______
[/code:1]
would you like a nice easy bending guide?
1:View media item 10602 2:View media item 10603 3:View media item 10605 4:View media item 10604 5:View media item 10601
well you're having it anyway...
To put a bend into conduit, the method depends on which end you need your measurement from... A or B ( fig 1 )
The following advice is based on your required measurement being to the back of the bend.
To bend from end B, you simply line up the measured mark with the outside of the former.. ( fig 2 )
To bend from end A is a little harder and requires a sacrificial piece of conduit (SPC) to obtain the required info..
Measure 500mm from end A of the SPC, place the mark at the back edge of the former ( fig 3 ) and bend to 90 degrees..
Now measure from end A to the top of the former ( fig 4 ) and this will be less than the 500mm..
The difference ( X ) is the measurement you need to add to your required measurement which you then line up with the back of the former ( fig 5 )
If you are working with an old bender that is not your own, you may find it has several marks drawn or notched into the former where someone has figured out that distance ( X ) in the past.. it's best to not use this as it's often subjective to the person doing the bending..
It may also be that the mark made is for bending to the midline of the bend or the inside of it..
If you need your measurement to be the center line of the bend..
From end A - Subtract half the diameter of the conduit from your measurement.
From end B - Add half the diameter of the conduit to your measurement.
If you need your measurement to be the inside of the bend...
From end A - Subtract the diameter of the conduit from your measurement.
From end B - Add the diameter of the conduit to your measurement.
1:View media item 10602 2:View media item 10603 3:View media item 10605 4:View media item 10604 5:View media item 10601
well you're having it anyway...
To put a bend into conduit, the method depends on which end you need your measurement from... A or B ( fig 1 )
The following advice is based on your required measurement being to the back of the bend.
To bend from end B, you simply line up the measured mark with the outside of the former.. ( fig 2 )
To bend from end A is a little harder and requires a sacrificial piece of conduit (SPC) to obtain the required info..
Measure 500mm from end A of the SPC, place the mark at the back edge of the former ( fig 3 ) and bend to 90 degrees..
Now measure from end A to the top of the former ( fig 4 ) and this will be less than the 500mm..
The difference ( X ) is the measurement you need to add to your required measurement which you then line up with the back of the former ( fig 5 )
If you are working with an old bender that is not your own, you may find it has several marks drawn or notched into the former where someone has figured out that distance ( X ) in the past.. it's best to not use this as it's often subjective to the person doing the bending..
It may also be that the mark made is for bending to the midline of the bend or the inside of it..
If you need your measurement to be the center line of the bend..
From end A - Subtract half the diameter of the conduit from your measurement.
From end B - Add half the diameter of the conduit to your measurement.
If you need your measurement to be the inside of the bend...
From end A - Subtract the diameter of the conduit from your measurement.
From end B - Add the diameter of the conduit to your measurement.
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H
holmslaw
..
Yes , a double set is where you come down the wall with spacer bar saddles and double set outwards near the end coupler, say 20mm or so, to allow space to bush into a trunking or switch box, etc.
The pic is like a Saddle set for jumping over obstacles like pipes etc.
The pic is like a Saddle set for jumping over obstacles like pipes etc.
it depends on the situation..
you may have a light that is about 750 from a wall that you need to conduit to.. so you measure center of hole to meet exactly with the entry hole..
you may be coming over the top of a partition wall above a false ceiling and need to measure the inside of the bend to come down the wall right..
whatever the reason, I've included the information in case he ever needs it..
you may have a light that is about 750 from a wall that you need to conduit to.. so you measure center of hole to meet exactly with the entry hole..
you may be coming over the top of a partition wall above a false ceiling and need to measure the inside of the bend to come down the wall right..
whatever the reason, I've included the information in case he ever needs it..
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