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Articles about Calculations

Energy Savings Controls for Outdoor Lighting

Updated: January 11, 2019 by: Dave Rongey

How can a photocell be used to control outside lights? Control Different Types of Outdoor Security Lighting so they Come On Automatically and Save Money on Your Electric Bill.

Older Homes and Up To Standard Government Requirements

Updated: October 18, 2016 by: Dave Rongey

Electrical Wiring Improvements for Older Homes – I understand that there are increasing regulations to require more energy efficient building codes which require more efficient electrical equipment for new construction.

Litahni in Kailua Hawaii asks Why is my Electric Energy Bill So High

Updated: July 11, 2015 by: Dave Rongey

How to Reduce Your Energy Bill: I have been having a high electric bill since I moved into my house.

Energy Savings Calculation for Lighting

Updated: February 4, 2015 by: Dave Rongey

How to Calculate Energy Savings for Lighting: Is there any difference in the energy savings if I replace light bulbs in a regular 120 volt fixture or in a 12 Vac low voltage fixture?

Why Your Apartment Electric Bill May Be High

Updated: January 22, 2015 by: Dave Rongey

Why the Electric Bill of an Apartment Condo or Flat May be High: How to Track Your Energy Usage, My apartment was using a lot of energy every day and I felt I was being charged for my neighbors electricity.

Electrical Calculations for Light Fixtures

Updated: January 6, 2012 by: Dave Rongey

How to Calculate and Determine Electrical Circuit Loads for Lighting Fixtures

Voltage Drop and Electrical Service Planning

Updated: August 26, 2011 by: Dave Rongey

I need to run close to 250′ at 220v for 20A (or 110v for 40A, but considering the length of run and voltage drop over distance, presume to go with 220v) wire size is borderline between #6 and #8…

Kilowatts and Kilowatt hours KWH

Updated: August 18, 2011 by: Dave Rongey

How to convert watts to kilowatt/hours