Electrical Systems & Lighting Articles - Page 7 — Knoji
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Many people have switched to using compact fluorescent (CFL) lightbulbs to reduce energy usage, but the technology is still in its infancy and there have only been a few long-term studies conducted. One of the most recent studies comes from Stony Brook and New York State Stem Cell Science which suggests CFLs might cause damage to skin by releasing UV rays. Based on the research, scientists concluded that CFL lightbulbs can be harmful to healthy skin cells.
Published by Daniel Snyder 68 months ago in Electrical Systems & Lighting | +11 votes | 0 comments
How to take a plain old light switch cover and turn it into a decorator plate cove to match the interior theme of a room or to match the decor. Sharpies have so many colors available now and you can take a basic light switch cover and turn it into a little piece of art in your room quite simply.
Published by Jaz 71 months ago in Electrical Systems & Lighting | +11 votes | 9 comments
The high-voltage section of a commercial or domestic microwave oven consists of four basic components—the high-voltage oil-filled capacitor, the high-voltage rectifier, silicon diode, the high-voltage filament transformer, and the magnetron tube. The high-voltage section of the microwave oven is the section that fails most often so we should begin our troubling with the high-voltage components.
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +4 votes | 2 comments
Of all the appliance found in the average home, the microwave oven is the dangerous for the DIY electrician to troubleshoot and repair. The magnetron, the power source for the microwave oven operates at extreme high voltage, 4,000 to 5,000 volts DC is not uncommon. Even with the appliance unplugged from the wall receptacle, this deadly high-voltage may still be present on the high-voltage, oil-filled filter capacitor if the bleeder resistor has become defective or has not had time to drain off t...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +7 votes | 6 comments
The Ohm's Law was named after the German physicist, Georg Ohm who first introduced the formula in 1827. In its most basic form the Ohms Law states that a current flowing in a circuit is directly proportional to the circuits voltage and varies inversely with the circuits resistance. In other words, double the voltage while keeping the resistance the same and the current will be doubled. On the other hand, double the resistance while keeping the voltage the same and the current will be reduced by ...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +10 votes | 7 comments
We are living in a wired world more so today than ever before and every mobile device comes with its own USB charger. All of these charger are alike in that they output 5.2 Volts DC (Direct Current) with a maximum 2000 mA load current (5.2 VDC at 2 Amperes) or 10.4 Watts. The problem with these USB chargers are that they are small and easily misplaced, or they become a tangled mess in a kitchen drawer. Newer Technology has solved that problem forever with their new, patented, Power2U AC/USB Wall...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +6 votes | 8 comments
There are many different types of electrical tape being used today. There are low-voltage plastic tapes, high-voltage rubber tapes, and cloth, friction tapes, just to name a few of the many types available. As a DIY electrician, you will be dealing mostly with low-voltage wiring. When referring to classification of electrical tape, low-voltage refers to branch circuits with 120 or 240-Volts applied across them. For low-voltage wiring you will be mainly using Black, or colored, plastic electrical...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +13 votes | 9 comments
Do you have a branch circuit breaker that trips open intermittently? Do you have an Edison Base fuse that blows out intermittently? Then the chances are good that you have an overloaded branch circuit. There are a couple of ways you can determine if an over load exists on any given circuit. One way is to connect a recording clamp-on Watt meter or Ampere meter to the circuit in question and read the load present when the breaker trips open or the fuse blows. Recording meters are expensive and not...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +5 votes | 2 comments
Many older homes still have some knob & Tube wiring being used in their walls and ceilings. This old wiring is still acceptable as long as it is in good condition and has not been buried with blown-in insulation. The problem with K & B wiring was that it was installed without running a third-wire system grounding conductor, so there was no provisions for a machine safety ground. Another serious defect with K & B wiring system, which was the preferred wiring system beginning in 1880 right on up t...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +6 votes | 2 comments
Electrical boxes (device boxes, outlet boxes, and junction boxes) are divided into two major types—“New Work” and “Old Work” boxes. “Old Work” boxes are also known as “Remodel Boxes” and “Retrofit Boxes”, either of which is more descriptive of how these boxes are used. Basically “New Work” boxes are reserved for use in new construction where the electrician still has access to the wall studs and ceiling rafters and is...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +4 votes | 1 comments
Electrical sub-panels are used for two purposes in residential wiring. The first reason that you might want to install a sub-panel is to expand the branch circuit capacity of your main breaker panel. If your main breaker panel has the ampacity to handle additional loads but lack the slots for new circuit breakers, you can use a sub-panel to house the new circuit breakers. The second reason you might want to install a sub-panel is for areas of high electrical loads, such as a workshop or an all-e...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +10 votes | 5 comments
One of the main problems with standard circuit breakers and fuses is that they do not respond to an arc situation. A circuit hot wire may come close enough to a grounded conductor or grounded surface to arc over. There is enough resistance in the gap between the hot wire and the ground so it does not register as a direct short, which means the circuit breaker will not trip open or the fuse will not blow. The arcing current generates enough heat to ignite the structural material surrounding it. A...
Published by Jerry Walch 72 months ago in Electrical Systems & Lighting | +3 votes | 0 comments
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