John Grabowski Archives

A One Inch Chase Nipple assembled with a locknut and bushing. The Nipple has one inch conduit dimensions similar to intermediate conduit.

One Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are one-inch electrical conduit dimensions? Answer: One-inch electrical conduit dimensions differ from the trade size. 1" is the trade size, and...

Close shot of an inch and one quarter EMT conduit bender

Inch and a Quarter Conduit Sizes

Dear Mr. Electrician: What are inch-and-a-quarter conduit sizes? Answer: The dimensions for various types of 1-1/4″ electrical conduits are below. One Inch and a Quarter...

These are two, inch and one half plastic threaded conduit bushings. They are used to protect the wire from the metal edges of electrical conduit and fittings.

Inch and One Half Electrical Conduit Dimensions

Dear Mr. Electrician: What are inch and one-half electrical conduit dimensions? Answer: Inch and one-half electrical conduit dimensions differ from the trade size. Inch and...

Two inch electrical conduit threaded couplings, and a chase nipple with locknut and bushing

Two Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are two-inch electrical conduit dimensions? Answer: Two-inch electrical conduit dimensions for various types of two-inch electrical conduits are below. Two Inch...

Two and a half inch trade size knockout punch and draw stud for punching a hole for two and half inch electrical conduit.

Two and One Half Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are Two and One Half Inch Electrical Conduit Dimensions? Answer: The dimensions for various types of 2.5″ electrical conduits are below. ...

A close shot of some three inch, schedule 40 PVC electrical conduit

Three Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are Three Inch Electrical Conduit Dimensions? Answer: Three Inches (3″) is the trade size, not the actual dimension of the electrical...

A three and a half inch conduit hand knockout punch with draw stud and accessories

Three and a Half Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are three-and-a-half inch 91mm electrical conduit dimensions? Answer: Three and a Half inches (3.5") is the trade size, not the actual...

A Light Switch Wiring Diagram that shows how electrical power enters the ceiling light electrical box and then a two conductor cable is installed to the switch without a neutral conductor. New switch installations are required to have a neutral conductor. Use a three-conductor cable to bring the neutral down to the switch.

Light Switch Wiring Diagrams

Dear Mr. Electrician: What are the choices of light switch wiring diagrams to wire a light switch to a ceiling light? Answer: Light switch wiring...

Effects of Electricity on the Human Body

Dear Mr. Electrician: What are the effects of electricity on the human body? Answer: Below is a chart that was compiled many years ago of...

Rust inside of old four gang electric meter base

4-Gang Electrical Meter Socket

Dear Mr. Electrician: How do I replace a 4-gang electrical meter socket base? Answer: Replacing a 4-gang electrical meter socket is a multi-step process involving...

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When you get to the construction phase of your home renovation project, you must be mindful of your personal safety as well as the safety of people and property that may be in proximity to your work. I wash my hands frequently while working because I come in contact with all kinds of things. I always have hand wipes available. Hard hats, gloves, and safety glasses offer the very basic personal protection. For certain tasks additional safety precautions need to be taken. For instance when working around live electricity, an electrician would need insulated tools and gloves rated for the voltages that he or she works on. Additionally it is important to conduct yourself in a safe manner during construction. Be mindful of heavy lifting or reaching in awkward positions. Use a ladder when working on the ceiling, or anything high for that matter. Chairs, buckets, milk crates, and anything else not made to be stood on, should not be stood on. One bad fall can change your life forever.

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