According to NEC the maximum content of cable in any size conduit is 40%.
Any bending shoe is sized for the given conduit diameter. Attempting to bend conduits other than the diameter specified by the shoe size will result in either flattening, kinking, rippling, or similar deformation of the conduit. Damage to the bending shoe may also result. The only exception are the ½”, ¾” and 1” EMT hand benders and other benders designed for PVC Coated Rigid. When bending ½” Rigid, the ¾” EMT bender is used and so on, up to 1” Rigid where the 1 ¼” bender is used. Using a hand bender like that for anything over 1” for rigid conduit is EXTREMELY difficult, that is why we do not carry one.
When bending PVC coated Rigid the use of a bender designed to handle PVC coated should be used, and the same rule applies; bend 1” PVC Coated in a 1 ¼” shoe.
All Rigid electrical conduit is schedule 40 in wall thickness. When inquiries are made on schedule 40 “tubing or pipe” it’s best to ask if they are referring to plumbing tubing, stainless steel tubing, or black iron pipe. Occasionally customer define schedule 40 differently than others and want to bend these other materials as opposed to electrical conduit. Our benders will handle schedule 40 only if it is MILD steel intended for electrical installations. The others are normally galvanized with made the material more stiff and rigid and can cause damage to the material being bent, the bender, or the end user.
Due to the amount of pressure caused by bending conduit, if a customer calls asking if they can weld a crack in a bending shoe the answer is NO. The weld may not penetrate the entire crack down into the inside of the shoe casting and it could end up like a hairline crack in a windshield. It is highly recommended to replace the shoe to prevent damage to the bender or end user.
There is a button head screw that holds the sprocket assembly in place on the B2000 bender. This is a common replacement part and is not listed in the parts breakdown.
Misc Item: ¼-20 x 3/8
Loc-tite is recommended to be used during the installation of this screw.
Although there are some repair parts available for the BHT-520 hot tube bender, the actual tube housing itself is not available as a replacement part.
Each meter has a specific range for accuracy; this is always listed in the unit’s manual. DC voltage will always have a better accuracy rating because its electrical wave form does not fluctuate like AC voltage.
If you are having trouble with the MSG-501 staple gun, please make sure that you are applying the appropriate amount of pressure when using. The correct amount of pressure to be used while on a flat surface; holding the staple gun as the manual instructed is 55lbs. More often than not, the user is trying to squeeze the handle using the force their hand. With the Cable Boss you want to use your body weight to trigger the staple gun.
Improper care of the tool can also cause it to jam or malfunction. Tool care should always be the priority after safety.
When kinking, flattening or rippling of larger size conduit is resulting, it’s best to replace the rollers and shafts before replacing the clamping jaw. Usually the rollers have worn out and are just due to be replaced. This will cure about 95% of all these issues. Also, make sure that there is an ample amount of conduit sticking out past the clamping jaw. If the end of the conduit is too close to the clamping jaw, it will start to flatten the conduit as it is bent due to the force being put on the conduit. The bending shoe and conduit may also need to be sprayed with a bit of WD-40. If the conduit is sticking to the bending shoe, it will start to pull and stretch the conduit which can cause deformation in the conduit.
If you are having this problem with PVC-Coated Rigid Conduit, try cleaning the shoe and conduit with rubbing alcohol. This is recommended by one of the leading manufactures in PVC-Coated Conduit.
Bending shoes on the B300 series one-shot and sweep benders can be interchanged from unit to unit provided the bender accommodates that size shoe. There is only one Repair Parts Sheet breakdown for the B300 series. All other required information is located in the catalog.