Conduit Bending

Conduit protects and carries electrical wiring, and electricians bend it to fit around corners, obstacles and equipment. Bending is a skill that takes practice. It also causes strains, pinches, cuts and slips, and bad bends cause problems when pulling wire. Good technique protects both your body and the quality of the installation.

• Electrical
• Construction
• Apprentices

Types of conduit

Common bends

• 90-degree bend (stub-up): turns the conduit at a right angle. A “take-up” amount is used to hit the exact length.
• Offset: two bends that shift the conduit to the side, such as to get around an object or into a box.
• Kick: a single small bend to change direction slightly.
• Saddle (three-bend, four-bend): goes over an obstruction, like a pipe, and returns to the same line.
• Parallel and concentric bends: matching bends for runs of several conduits.

Each bend has math and marks that depend on the bender: the rise, the angle, the distance between bends and the shrink caused by the bend. Learn the formulas for your bender, and use a bender’s instruction guide.

NEC rules on bends

• No more than 360 degrees of bends between pull points. The National Electrical Code limits the total bends between pull points (boxes, fittings or conduit bodies) to the equivalent of four quarter bends, or 360 degrees, for most conduit types. Too many bends make wire pulling hard and can damage the insulation. See wire and cable pulling.
• Bends must not damage the conduit or reduce its internal diameter, such as by kinking or flattening.
• The minimum bend radius depends on the conduit type and size, and on the cable. Use a bender made for that conduit size, and follow the code tables. See National Electrical Code.
• Conduit must be supported and secured as the code requires, and cut ends must be reamed.
• Codes change, and local rules vary, so check the edition your area uses.

Safe bending: body mechanics and tools

• Use proper technique. Place the bender on a hard, level surface (the floor or a bench), put your foot on the bender’s heel, and bend with your legs and body weight, keeping a straight back. Don’t jerk or twist. See Lifting & Ergonomics.
• Choose the right bender for the job: hand benders for small EMT, mechanical or hydraulic benders for larger sizes, and electric benders for repeated work. Use only the size designed for the conduit.
• Support long conduit, since the weight can twist you off balance. Use a stand, a second person or a bench.
• Keep hands and fingers clear of the bender head, the shoe and the conduit end where they can pinch. Wear gloves, but not loose ones near hydraulic or powered benders. See Hand Protection.
• Check the footing, and keep the area clear of cords and scrap. A conduit bender can slip during a pull. See Slips, Trips & Falls.
• Use powered benders carefully. Read the manual, set stops and shoes properly, and keep hands away from moving parts. Use lockout for service. See Hand Tool Basics.
• Wear safety glasses and safety shoes. See Eye & Face Protection and Foot Protection.
• Take breaks and rotate tasks. Bending, pulling and overhead work strain shoulders, backs and wrists. See Musculoskeletal Disorders and overhead work.

• Don’t use a pipe on the handle to get more leverage, unless the maker allows it, since it can break the bender.
• Don’t use a bender with a cracked head, bent handle or missing parts. See Tagging Out Damaged Tools.
• Don’t bend conduit that is hot, damaged or already kinked. Cut out kinked sections.
• Don’t bend live or energized conduit, and don’t bend conduit that holds wiring. See Lockout/Tagout.

Cutting, reaming and threading

• Cutting: use a tubing cutter, a hacksaw or a band saw, and clamp the conduit. Cut ends are sharp and cut hands. Wear gloves and eye protection. See Pipe & Tubing Cutters and Portable Band Saws.
• Reaming: remove burrs from the inside of cut ends with a reamer so they don’t cut wire insulation.
• Threading rigid conduit: use sharp dies and cutting oil, and a stable stand or a threading machine. Keep hands and clothes away from rotating parts. See Pipe Threaders.
• Clean metal chips and shavings from the floor, and dispose of them safely.

Bending PVC conduit

• PVC is heated in a hot box or with a heat blanket until it softens, then formed to the bend and held until cool.
• Burns: hot PVC and the heater’s surfaces cause burns. Wear heat-resistant gloves, and handle the conduit with care. Don’t use an open flame or heat gun, which can scorch or ignite the plastic. See Heat Guns.
• Fumes: overheated PVC gives off harmful fumes. Work with ventilation, and don’t overheat.
• Electrical safety: use GFCI-protected equipment and keep it dry. See GFCI.
• Fire safety: keep the heater away from combustibles, and never leave it unattended.

Jobsite practices

• Plan the run. Measure twice, mark bends and keep the number of bends in the limit. Check for obstacles before bending.
• Use benders, saws and threaders in a stable workspace, with room around you. Secure the conduit before cutting.
• Keep conduit stored flat, and carry it with a partner or on a cart. Long lengths can strike people, especially near power lines, ladders and corners. See Overhead Power Lines.
• When installing overhead conduit, use proper lifts and ladders. See Scissor Lifts and Step Ladders.
• When bending near live gear, keep your distance. Ask before working in existing panels or equipment.

Conduit bending checklist

• The bender matches the conduit size and type, and is in good condition
• Bends are planned, with no more than 360 degrees between pull points
• I bend with my legs on a firm, level surface, and support long conduit
• Cut ends are reamed; gloves and safety glasses are worn when cutting
• PVC is heated with a proper hot box or blanket, with ventilation and heat-resistant gloves
• Conduit is carried safely and kept away from overhead lines

Last updated: October 4, 2026