Safe Shorepower By Don Casey However you bring shorepower aboard your boat, if you do it without the appropriate safeguards, you place yourself, your crew, and your guests at a terrible — and foolish — risk. Three-Conductor System AC circuits use three wires, and it is essential to your safety to understand the function of each. Because the direction of current flow in an AC circuit is reversing times per second 60 positive-to-negative-and-back-to-positive cycles , it is counter-intuitive to refer to one side of an AC circuit as positive and the other as negative. Instead, we call one side hot, the other side neutral. By code the hot wire in an AC circuit is black, red, or blue; the neutral wire is always white. Since the neutral side is connected to ground, it is the hot side of the circuit that is the most dangerous. However, you should always treat both sides with equal respect because a wire reversal to the outlet will make the neutral side hot. A short to the case instantly becomes a short to ground, probably opening the breaker in the circuit.
Last week we covered the type of base needed for a hot tub, this week I want to go over what you will need to get your new spa all powered up. We work with a handful of great electricians in the Amesbury and greater North Shore Massachusetts area who do great work and we can match you up with a capable company when you buy your hot tub. Standard Spa Electrical Requirements:
Nov 16, · I know the GFCI breakers are pricy, but if I have to buy a 50 amp 2 pole breaker and run 6AWG wire to the spa panel, the 30 amp GFCI breaker solution with .
Here’s the test to make sure the secondaries are both pushing the same direction. Our two secondaries in series produce 38volts AC with no load. That seems about right. If they’d phased wrong it could have been fixed by reversing the wiring to any winding. Where Tim says “out of phase” in the video, he means “in phase”. That is, the center tap should be less than the outer two leads, and if things weren’t that way, the transformers would be fighting each other, or phased wrong.
Add Tip Step 8: Weld holy cow, it works! We wanted to add a series inductor to give the unit more “inertia”, but it didn’t matter! Here’s Tim welding with some of those. Built your welder, but not sure how to weld?
In addition to preventing electrocution, GFCI outlets can also reduce the risk of house fires caused by electrical problems, and reduce damage to appliances caused by faulty electrical circuits. A GFCI outlet monitors the flow of energy through the circuit. Which outlets are GFCI outlets? GFCI Outlets are usually installed in wet areas, such as kitchens, bathrooms, and pool areas, as well as places like garages, basements, workshops, and crawl spaces.
While encouraged to install these outlets everywhere, these areas are of the most concern as they are prone to the developments of ground faults.
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Power bars are unsightly and who wants extension cords snaking all over the floor? Besides, these can be fire hazards as well as overly attractive to small children. Maybe you are changing the location of the TV or installing an over-the-range microwave, or maybe you bought a new computer desk. Whatever the reason, there isn’t a handy outlet for the equipment and you need one.
This is when it becomes necessary to add a new plug-in by wiring it into an existing one. This article will walk you through not only the mechanics of putting a new electrical outlet into the wall, but also running the wire and tapping into the existing circuit. The tools and materials will be discussed as well as the procedures and tips for doing the job in the easiest manner possible. While the task will take some work and may involve crawling through attics or crawl spaces, it is not particularly esoteric or difficult to understand.
You can do it. Tools You’ll Need Most of these items should be in your tool box, but some are a little more specialized.
Remember, you can always use extension cords to feed stand-alone appliances. Also see the configuration of other sockets. People are often looking for a 3-prong to 4-prong adapter.
3) The 2 hot wires will terminal on the the main panel, then on the lugs in the disconnect, then from the GFCI to the tub. Edited by Mike G. on 6/19/ at PM EST Mike G., Master Electrician.
AFCI vs grandfathering homes older than This does not address grandfathering for homes older than ! Granfathering and the AFCI requirement: We find a variety of opinions among building code officials. At a recent building addition project the BCO wanted AFCIs in the new sub panel in keeping with the new electrical code AFCI recommendations, but he also decided that other areas in the home needed certain updates too.
Other electrical inspectors and building code inspectors look only at the new work – I’d say that’s the most common case. Only when an older home is being renovated to include electrical work will most inspectors call for current codes to be complied-with.
Are you sure you want to delete this answer? Yes Sorry, something has gone wrong. A GFCI receptacle can be installed on any type of wiring system. This is because, although you will be protected from a ground fault event, any “3-wire” equipment plugged into that receptacle will have no grounding connection. If you install a GFCI type circuit breaker, the same rule applies, any 3-opening receptacles will require the same label be applied.
A ground-fault circuit interrupter (GFCI), on the other hand, provides a high degree of shock protection. If you accidentally touch an energized wire or component and you are grounded, the GFCI disconnects the circuit in about 1/40 of a second, too little time for the current to build to a .
It’s probably similar to what I mentioned, that is, it is probably older and not shielded well. You can try a new hairdryer, but I wouldn’t worry about affecting other things in the house. The hair dry is fairly new probably 5 years old. I guess I’ll just make sure I unplug it before I operate. However, a lot of amateur setups have improperly designed or installed antennas.
Common-mode RF currents in the antenna feed system will travel right down the feedline, to your transmitter, down its power cord, and into every other device in your house which is connected by the mains wiring, including all your GFCI outlets. Your house, and all the wiring in it, is essentially an oddly shaped radial, and RF currents will use it, if you don’t do something to stop them.
A GFCI is effectively a common-mode current detector. When an electrical device isn’t electrocuting someone, the current on the hot conductor is exactly balanced by current on the neutral conductor. That is, there is no common-mode current. When you are holding a cold water pipe with one hand, and a faulty hair dryer with another, now some of that current can return to ground through the water pipe.
Now the currents on the hot and neutral conductors aren’t balanced: The GFCI concludes someone is being electrocuted, and opens the circuit. Of course, a GFCI can’t tell if the common-mode currents are due to you being electrocuted, or exist because your antenna finds your house’s wiring as a favorable RF return.
Print —Check local regulations for restrictions and permit requirements before beginning electrical work— The user of this information is responsible for following all applicable regulations and best practices when performing electrical work. If the user is unable to perform electrical work themselves, a qualified electrician should be consulted. As of the NEC, most new and replacement receptacles must be tamper-proof. This requirement is designed to protect small children from injury by preventing the insertion of objects, other than electrical plugs, into the receptacle contacts.
Some exceptions to this requirement include wall receptacles that are more than 62 inches from floor level and large appliance receptacles located out of reach.
GFI/GFCI OUTLETS – WHAT YOU NEED TO KNOW! GFI (Ground Fault Interrupter) or GFCI (Ground Fault Condition Interrupter) devices are a very important component of your RV’s electrical system!
Upgrade your outdated receptacles without the expense of rewiring By Harry Sawyers of This Old House magazine Photo by Keate Photo by Keate Two-prong receptacle ungrounded Old-fashioned two-prong receptacles connected to two-wire cables don’t have the ground wires that protect people and electrical devices in case of a fault. Yet it is possible to retrofit a new three-prong or GFCI receptacle into the same outlet box without any rewiring, as long as the box itself is grounded.
Luckily, metal boxes attached to armored, or BX, cable—a type of wiring commonly found in old houses—generally are grounded; the cable’s flexible metal jacket serves the same purpose as a dedicated ground wire. To switch out your receptacles, just follow the steps. Insert one prong of a circuit tester into the receptacle’s hot slot the shorter one , and touch the other to a screw that secures the cover plate.
The tester should light up. You can install a GFCI see tip at bottom , or call an electrician to fix the wiring.
Ground and Neutral Wiring for a Volt Range. Can I install a 3 wire cord on a new stove and strap the neutral and ground on the stove terminals? I have an older house with an old 3 wire range. The receptacle is wired with 2 hot wires and a un-insulated twisted aluminum conductor for ground. The replacement stove has a 4 wire, 2 hots, neutral and ground.
The GFCI breaker was the problem, but the electrician insisted there was nothing wrong with the breaker. So, eventually we got another electrician out to fix the problem by removing the faulty GFCI breaker and replacing it.
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