John Grabowski Archives

An outdoor light fixture with Christmas lights wrapped around it and plugged into the light bulb socket and energized

Holiday Safety Tips

Dear Mr. Electrician: What are some holiday safety tips? I want to ensure my home is safe from fire and electrical shock for the...

Five inch and four inch PVC electrical conduit emerging from the ground. Conduits are attached to a wood utility company power pole and are for the electrical and telephone service for a building

Five Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are the five inch electrical conduit dimensions? Answer: Five Inch (5″) is the trade size, not the actual dimension of the...

Half inch electrical conduit fittings for EMT, rigid, flexible conduit, and sealtight

Half Inch 1/2″ Electrical Conduit Dimensions

Dear Mr. Electrician: What are half-inch 1/2" electrical conduit dimensions? Answer: Half-inch electrical conduit dimensions are not the same as the trade size. Half-inch (1/2")...

Three quarter inch flexible metal conduit connectors, strap, and plastic bushings

Three Quarter Inch Conduit Dimensions

Dear Mr. Electrician: What are the dimensions of a three-quarter-inch (3/4") electrical conduit? Answer: Three-Quarter Inch Electrical Conduit Dimensions are below. Three-quarter inch (3/4″) is...

Depicting hard hats, work gloves, face shield, safety goggles, hearing protection, and a dust mask for when you plan to safely work around your home

Be Safe When Working Around Your Home

Dear Mr. Electrician: How to be safe when working around your home? My wife and I recently purchased our first house. It needs some...

Testing a Dishwasher Appliance for Power

Dear Mr. Electrician: How do I go about testing my dishwasher appliance for power? Last night, I tried to wash dishes, but nothing happened. ...

An old electric wall switch removed from the electrical box, but still connected

Add Light Switch To Existing

Dear Mr. Electrician: How do I add a light switch to an existing switch? I want to change from a one-gang light switch to...

Photo of four inch PVC and EMT electrical conduit factory made elbows and EMT compression couplings

Four Inch Electrical Conduit Dimensions

Dear Mr. Electrician: What are the actual four-inch electrical conduit dimensions? Answer: The dimensions for various types of 4″ electrical conduits are below. Four Inch...

Three-way switch wiring diagram with the LINE and the LOAD inside separate switch boxes. LINE power is delivered to the first switch by using a two conductor cable with a bare or green equipment grounding conductor. The LINE wire is connected to the COMMON terminal on the 3-way switch. A three conductor cable goes from one switch box to the other switch box. From the second switch box a two conductor LOAD cable goes to the light fixture or ceiling fan. The black LOAD wire is connected to the COMMON switch terminal and the two white neutral wires are simply joined together with a wirenut.

Three-Way Switch Wiring Diagrams

Dear Mr. Electrician: I need to see some three-way switch wiring diagrams. I have two switches that control one light in my kitchen. I...

Universal Electric Motor Internal Wiring Diagram

Single Phase Electric Motor Diagrams

Dear Mr. Electrician: Where can I find single-phase electric motor diagrams? Answer: I have compiled a group of single-phase electric motor diagrams and terminal connections...

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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.

Tag: John Grabowski