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It is a great pleasure to announce the publication by McGraw-Hill of my new NEC 2011 guidebook. Reader feedback will be appreciated --



My second McGraw-Hill book for electricians, Troubleshooting and Repairing Commercial Electrical Equipment, now available from Amazon --






Now I've written a third McGraw-Hill book, out soon. The title is The Electricians's Trade Demystified. It is available for pre-order from Amazon. Click below --








You Can Pass Your Journeyman or Master Electrician's License Exam the First Time You Take It



Enroll in David Herres Electricians' Licensing Exam Course


(Details at electriciansexamprep.com )





The Future of LED Lights


By this point we all know that the future of lighting is the descriptively named light emitting diode. In 1962, the first LEDs to be released as practical electronic components only produced red light with very low intensity, but the original creators could not have known the exponential growth that this technology would experience over the years. Now we live in a world filled with LED lights ranging from the infrared to the ultraviolet and used in every facet of life; from lighting our homes to performing as vital components in some of the most high tech experiments in the world. This is just the beginning.

Most of us with a career as electricians or at least an interest in electronics are familiar with the concept of Moore's Law. This is the concept that the number of transistors on integrated circuits will double over the span of about two years, which should just about double chip performance in the same amount of time. This has held true since 1965 and some have predicted that this could feasibly continue until 2020. What's fascinating is that LED lights have their own version of Moore's Law.

The efficiency of LED lights has been rising in truly exponential fashion since the 60's and it shows no evidence of slowing down. This is known as Haitz's Law and it is named after Dr. Roland Haitz. To be specific, the law states that over the course of ten years the cost per lumen produced by LED lights will decrease by a factor of ten. Alongside this increase in efficiency, the amount of light that a single LED is able to produce will increase by a factor of twenty in those same ten years. This makes for an absolutely astounding pace of advancement over a very short period of time and this is made obvious by some of the LED lights that have been developed by the leading companies in the field.

What does this mean for the future of LED lights? Well, if the 2010 press release from Cree stating that they have developed LED lights that can run at an efficiency of 208 lumens per Watt at room temperature (surpassing Haitz's Law by ten years) is to be believed, amazing things are in store in the near future.




Check specifications on these quality oscilloscopes --

GOS6200 Instek 2x100MHz analog oscilloscope



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Wilderness Light Photography: Custom, commercial, landscape, nature, weddings, portraits, stock images by Judith Howcroft -- wildernesslightphotography.com


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Electricians' Books


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Summit Source

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Klein Tools


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Milwaukee 49-22-4085 17 Piece Deluxe Electricians' Hole Saw Kit

Milwaukee 49-22-4085 17 Piece Deluxe Electricians' Hole Saw Kit

Milwaukee 49-22-4085 17 Piece Deluxe Electricians' Hole Saw Kit Since its founding in 1924, Milwaukee has focused on a single vision: to produce the best heavy-duty electric power tools and accessories available to professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy. This deluxe 17 piece Electricians' Hole Saw Kit has the ultimate range of diameters available. The 12 diameters include: 5/8 inch, 3/4 inch, 7/8 inch, 1 inch, 1-1/8 inch, 1-1/4 inch, 1-3/8 inch, 1-1/2 inch, 1-3/4 inch, 2 inch, 2-1/2 inch, and 3 inch. The kit also includes arbor 49-56-7000 for hole saws up to 1-3/16 inch and arbor 49-56-7140 for hole saws 1-1/4 inch and larger. Additionally the kit has three pilot bits 49-56-8000 and an impact resistant plastic carrying case. The case is also sold separately as 48-55-0784. The hole saws in this kit are of the 6 teeth per inch design. Milwaukee 49-22-4085 17 Piece Deluxe Electricians' Hole Saw Kit Features: • Deluxe assortment of 12 hole saws, two arbors, and three pilot bits • Hole Saws: 5/8 in., 3/4 in., 7/8 in., 1 in., 1-1/8 in., 1-1/4 in., 1-3/8 in., 1-1/2 in., 1-3/4 in., 2 in., 2-1/2 in., 3 in.


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Apple Online Store


Hi! Welcome to electriciansparadise.com, a new site dedicated to the spread of electrical knowledge and expertise. You will find in these pages --


New additions on this site --



Elementary Particles

What is a Proton?

What is a Neutron?

What is a Black Hole?

What is a Particle Accelerator?

What is Quantum Theory?

What is the Standard Model?

What is the SchrÔøΩdinger's Cat Paradox?

What is Quantum Entanglement?

What is the Higgs Boson?

What is String Theory?

What is Heisenberg's Uncertainty Principle?

What is a Photon?

What is a Antimatter?

This site is created and conducted By David Herres, NH Master Electrician License #11335M

E-mail: David@electriciansparadise.com


HOME | Best Web Host | Question of the Week | Archived Questions | More Archived NEC Questions | Still More Archived Questions | Still More Archived Questions-2 | Still More Archived Questions-3 | Articles | Electrical Deficiencies | More Electrical Deficiencies | Electricians Tools | Online computers | Cybercorner | Electrician's License | Electronics Tutorials | Electricians' worksaving ideas | Electronic Theorems | Satellite Dish | Digital Cameras and Equipment | HTML Color Chart | Electronic Acronyms | Electronic Definitions | Electrician's Soldering Tutorial | Photovoltaic Power | Wind Power | Fire Alarm Basics | More Fire Alarm Info | Working with MC and EMT | Electricians' Color Code | Wiring Commercial Garages | Managing Your Emergency Lights | Lighting Design | Industrial Wiring | Wiring Ethernet | Residential Wiring | Low Voltage Wiring | PLC Overview | Electrical Troubleshooting Techniques | Using Loop Impedance Meter | Ten Common Grounding Errors |NEC and Low-Voltage Wiring | Raceway Protection and NEC | Working with Metal Raceway | Inductance and Characteristic Impedance | Understanding Capacitance | History of the Ethernet | Twisting Data Conductors | NEC Article 800, Communications Circuits | NEC Article 810, Radio and Television Equipment | NEC Article 820, Community Antenna and Radio Distribution Equipment | NEC Article 830, Network-Powered Broadband | Troubleshooting Submersible Well Pumps | Transfer Switch Basics | First Edition National Electrical Code 1897 | Wiring Healthcare Facilities | Elementary Particles | Links


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