SceneryDriver
Senior Member
- Location
- NJ
- Occupation
- Electrical and Automation Designer
I use the screw-on insulating bushings such as these:
http://yblighting.com/media/catalog...f78eab33525d08d6e5fb8d27136e95/8/3/831_21.jpg
whenever I have to use GRS nipples to connect enclosures, and I'm in the habit of using them on larger runs of EMT that terminate in enclosures. I tend to use them when the conduit is filled to near max, or when the conductors might be raked over an edge due to the geometry of a wire pull.
Is there a hard and fast rule of where their use is required? It makes sense to use them on rigid nipples, as there can be sharp edges, but is it really necessary to use them everywhere? I've never seen them used when a 1/2" conduit enters a 4-square box, for instance.
SceneryDriver
http://yblighting.com/media/catalog...f78eab33525d08d6e5fb8d27136e95/8/3/831_21.jpg
whenever I have to use GRS nipples to connect enclosures, and I'm in the habit of using them on larger runs of EMT that terminate in enclosures. I tend to use them when the conduit is filled to near max, or when the conductors might be raked over an edge due to the geometry of a wire pull.
Is there a hard and fast rule of where their use is required? It makes sense to use them on rigid nipples, as there can be sharp edges, but is it really necessary to use them everywhere? I've never seen them used when a 1/2" conduit enters a 4-square box, for instance.
SceneryDriver