Electrical Wiring Methods in a Modular Home

I have a new home and I have several electrical questions about electric wiring codes which these issues may violate: Electrical Wiring Methods and Procedures Reviewed.

Electric Wiring
Electrical Question: I have a new modular home and I have several electrical questions, to which I am seeking your professional opinion and also the code #’s which these issues may violate.

1. Does a stove hood fan need to be installed using an electrical box?
   Mine was hung by the electrical cable coming through a hole punched in wall, then directly connected to the fan/hood. What code governs this?
2. Do vanity light fixtures installed above mirror over sink require installation using an electrical box?
   Mine had a wire punched through hole in wall & then connected to fixture. Fixture had 2’face plate on it and had 2 screws on each side. These screws were all that held the fixture up.What code governs this?
3. New outlets and new light switches on back splash, interior walls, throughout home.
   When I needed to open an outlet to add a new light fixture, the local man told me that there was no slack in the wires coming from behind the fixture and none coming into the fixture. This prevents us from doing any work on this outlet or light switch. I think this violates NEC 300.14. Is this correct?
4. What is the code for sheathing the three wires that come in from the wall and into the outlet boxes?
   I was told the 3 wires needed to be wrapped with this sheathing or insulation to prevent fire hazard. I have seen places where it said 1/4″ and 1″, trying to find out what code really is. Some of mine have no insulation or sheathing around those 3 wires at all. Some of the outlets have 3 sets of wires coming into the box. One may have sheathing around a set, 2nd set may have none, 3rd set had 1/4″. What is code?

Thank you so much for any help you can give me here with the Massachusetts Code or NEC code or Fire code.

This electrical question came from: Patricia, a Homeowner from Boston, Massachusetts.

Dave’s Reply:
Thanks for your electrical question Patricia .

Home Electrical Wiring Methods

Application: Installing Home Electrical Wiring.
Skill Level: Intermediate to Advanced.
Tools Required: Electricians Pouch of Hand Tools for Rough-In Wiring, Electric Drill and Auger Bits, Extension Cords, and a Ladder as needed.
Safety: All personal safety measures must be taken when performing remodel projects where you may come into contact with hazardous materials and environmental contaminants such as fiberglass insulation, vermiculite and asbestos, molds or mildew, as well as dust.
Estimated Time: Depends on the extent of the project, the type of wall coverings and structural construction and available access to the project area.
Precaution: Any existing wiring in the immediate area that may interfere with the installation should be identified and turned OFF and Tagged.
Notice: Installing additional electrical wiring or upgrading existing electrical circuits and wiring should always be done according to local and national electrical codes with a permit and be inspected.

Electrical Wiring Methods and Procedures Reviewed

Patricia’s consultation with me received a direct reply about these matters, where we discussed the specific code articles and the electrical wiring project was inspected by the local building department. The concern here is to make sure that all electrical wiring is installed with a permit and then inspected. The Electrical Code section of this website may serve as a good reference for Electrical Wiring Projects.

Electrical Codes about Home Wiring
Electrical code

• Electrical Code Articles
• Electrical Code Directory covering AFCI circuit, electrical-boxes, electrical-circuit, electrical-code-outlets, electrical GFCI, electrical-grounding, electrical-project, electrical-services, electrical-underground, electrical-wiring, electrical-wiring-code, lighting-code, smoke-detector,

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This link is helpful as a Homeowner
Do-It-Yourself Electrical

The following may also be helpful for you:

Dave's Guide to Home Electrical Wiring: » You Can Avoid Costly Mistakes! « Wire It Right with the help of my Illustrated Wiring Book Great for any Home Wiring Project. Complete Guide to Home Electrical Wiring Perfect for Homeowners, Students, Handyman, Handy Women, and Electricians Includes: Wiring GFCI Outlets Wiring Home Electric Circuits 120 Volt and 240 Volt Outlet Circuits Wiring Light Switches Wiring 3-Wire and 4-Wire Electric Range Wiring 3-Wire and 4-Wire Dryer Cord and Dryer Outlet Troubleshoot and Repair Electrical Wiring Wiring Methods for Upgrading Electrical Wiring NEC Codes for Home Electrical Wiring ....and much more. Learn more about Home Electrical Wiring with my Online Video Course: Basic Home Electrical Wiring by Example

Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.

Electrical Tips to Help You Wire it Right The Safest Way to Test Electrical Devices and Identify Electric Wires! The Non-Contact Electrical Tester This is a testing tool that I have had in my personal electrical tool pouch for years, and is the first test tool I grab to help identify electrical wiring. It is a Non-contact tester that I use to easily Detect Voltage in Cables, Cords, Circuit Breakers, Lighting Fixtures, Switches, Outlets and Wires. Simply insert the end of the tester into an outlet, lamp socket, or hold the end of the tester against the wire you wish to test. Very handy and easy to use. The Quickest Way to Check for Faulty Electrical Wiring! The Plug-In Outlet Tester This is the first tool I grab to troubleshoot a problem with outlet circuit wiring. This popular tester is also used by most inspectors to test for power and check the polarity of circuit wiring. It detects probable improper wiring conditions in standard 110-125 VAC outlets Provides 6 probable wiring conditions that are quick and easy to read for ultimate efficiency Lights indicate if wiring is correct and indicator light chart is included Tests standard 3-wire outlets UL Listed Light indicates if wiring is incorrect Very handy and easy to use. Strip Off Wire Insulation without Nicking and Damaging the Electric Wire! The Wire Stripper and Wire Cutter My absolute favorite wire stripping tool that I have had in my personal electrical tool pouch for years, and this is the tool I use to safely strip electrical wires. This handy tool has multiple uses: The wire gauges are shown on the side of the tool so you know which slot to use for stripping insulation. The end of the tool can be used to grip and bend wire which is handy for attaching wire onto the screw terminals of switches and outlets.. The wire stripper will work on both solid and stranded wire. This tool is Very Handy and Easy to Use.

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