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2015 Residential Wiring Guide 12th Edition (v.2) This guide is designed to help

2015 Residential Wiring Guide 12th Edition (v.2) This guide is designed to help you install residential wiring safely and in accordance to the standards set by the 12th edition of the Manitoba Electrical Code 2015. Every effort has been made to ensure the accuracy of the information in this booklet. However, in the event of a discrepancy between this booklet and the governing Manitoba Electrical Code, The Manitoba Electrical Code shall take precedence. Remember, the Manitoba Electrical Code is constantly being updated. Be sure to familiarize yourself with the latest code requirements before you begin wiring. The Manitoba Electrical Code has been established to protect you and your family from shock and fire hazards that may occur when wiring is improperly done, or if sub-standard materials are used. Don’t take shortcuts. Violating the code puts lives at risk. Users of the Residential Wiring Guide (the “Guide”) are responsible to ensure that their electrical wiring is installed in compliance with the current Manitoba Electrical Code and any other applicable laws, regulations, by-laws and codes. Users rely on the information contained in this Guide at their sole risk and are strongly encouraged to seek the advice of a qualified electrician regarding their electrical wiring installations. Manitoba Hydro shall not be liable for any injury, loss or damage caused to any person or property by reason of defects in any electrical wiring or in any improper installation of electrical wiring resulting from the use of this Guide. You can view or print a copy of this guide on our website at hydro.mb.ca. If you have any questions or would like to make arrangements for an inspection, call 204-480-5900 in Winnipeg or 1-888-624-9376. 1 2 Residential Wiring Guide Introduction “Do It Yourself” is a popular theme for home and cottage owners these days. Manitobans are choosing to build new homes, additions and cottages, so it is only natural that installing electrical wiring has joined the realm of do-it-yourself projects. However, electrical wiring must be installed safely and correctly in accordance with the current Manitoba Electrical Code. Manitoba Hydro has published this guide to help you install your own wiring safely and in such a way that the finished installation will comply with the Manitoba Electrical Code. Manitoba Hydro strongly recommends that wiring be done by licensed electricians. However, if you would like to do your own wiring, and feel capable, this manual will help. If you have any doubts about wiring a particular area of your home or cottage, do not proceed until you have consulted with an electrician and conﬁrmed the correct way to proceed. Anyone who plans to carry out electrical installation work is required by law to obtain an electrical wiring permit. Permits for Winnipeg are issued by the City of Winnipeg Planning, Property & Development Department, Development & Inspections Division, 4th Floor, 65 Garry Street, Winnipeg, Manitoba, R3C 4K4. If the building to be wired is located outside Winnipeg, you must apply for your permit online at hydro.mb.ca Manitoba Hydro service Power is distributed to residences and cottages through overhead wires or underground cables. The service supplied is a three-wire service, which consists of two live conductors and one neutral conductor. Three-wire service provides 120-volt, 120/240 volt and 240-volt capabilities. 3 CHAPTER I – THE WIRING PLAN General. ...................................................................................................................................................................................................5 Kitchen. ....................................................................................................................................................................................................5 Bathrooms and washrooms...............................................................................................................................................7 Laundry areas...................................................................................................................................................................................7 Garage/Carport. .............................................................................................................................................................................7 Outdoor receptacles. .................................................................................................................................................................7 Basement area. ................................................................................................................................................................................7 Other areas of the dwelling...............................................................................................................................................7 Balcony or porch...........................................................................................................................................................................8 Central vacuum system. ..........................................................................................................................................................8 Smoke alarms. ...................................................................................................................................................................................8 Carbon monoxide alarms. .....................................................................................................................................................8 Heat sensors in storage garages...................................................................................................................................8 Submersible pumps installed in lakes, rivers and streams. ....................................................................8 Service size. ..........................................................................................................................................................................................9 Obtaining an electrical permit. .........................................................................................................................................9 CHAPTER II – MATERIALS Explanation of material and terms. ..........................................................................................................................11 CHAPTER III – TOOLS REQUIRED Equipment safety. ......................................................................................................................................................................14 CHAPTER IV – WIRING Service conduit. ...........................................................................................................................................................................16 Meter sockets...............................................................................................................................................................................17 Served from underground supply............................................................................................................................17 Service box and distribution panel. ..........................................................................................................................19 Service grounding. ....................................................................................................................................................................19 CHAPTER V – CIRCUITS Running cables. ............................................................................................................................................................................20 Mounting boxes. .........................................................................................................................................................................21 Receptacles.....................................................................................................................................................................................22 Colour coding of conductors. .......................................................................................................................................25 CHAPTER VI – WIRING TIPS Attaching conductors to screw type terminals...........................................................................................26 Use of wire connectors......................................................................................................................................................26 Supporting cables.....................................................................................................................................................................26 Metal protectors........................................................................................................................................................................26 CHAPTER VII – INSPECTIONS Rough-in inspection..............................................................................................................................................................27 Final inspection. ...........................................................................................................................................................................27 CHAPTER VIII – WIRING AN EXISTING BUILDING Service size. ......................................................................................................................................................................................28 Upgrading existing branch circuits. ..........................................................................................................................28 Safety. ....................................................................................................................................................................................................29 CHAPTER I – THE WIRING PLAN In this chapter, we’ll detail what information should be marked on a floor plan to develop a wiring system, the size of service required, and how to obtain an electrical permit. Figure 1 shows an example of a floor plan on which a wiring system has been developed. Floor plan - Figure 1 DRIVEWAY LIVING ROOM GFCI PROTECTED BEDROOM 3 KITCHEN UTILITY ROOM BEDROOM 2 BEDROOM 1 WASH ROOM 4 LEGEND 3W CIRCUIT TO PANEL 2W CIRCUIT TO PANEL CCTS 12 & 16 AFCI & GFCI PROTECTED CCT.1 - 1 POLE 20A TYPE 5-20R GFCI PROTECTED CCT.2 - 1 POLE 20A TYPE 5-20R GFCI PROTECTED 20A - 5 - 20R (T-SLOT) RECEPTACLE W.P. GFCI PROTECTED W.P. GFCI PROTECTED 5 General a) All 15 amp (5-15R) and 20 amp (5-20R) receptacles shall be tamper resistant and shall be marked. Receptacles that are dedicated for stationary appliances where the receptacle is inaccessible or for those located 2 metres above the floor or finished grade are not required to be tamper-resistant. b) Each branch circuit supplying 15 amp (5-15R) and 20 amp (5-20R) receptacles shall be protected by a combination-type Arc Fault Circuit Interrupter (AFCI). Receptacles installed for the kitchen fridge, kitchen counters, kitchen island, kitchen peninsular and those installed within one metre of the bathroom or washroom sink will be exempt from the AFCI requirements. A single receptacle for a sump pump will also be AFCI exempt when labelled to identify it as the sump pump receptacle. In lieu of an AFCI breaker, an AFCI outlet branch circuit-type interrupter may be used when it is installed as the first outlet on the circuit and the wiring method from the overcurrent device to the first outlet is a metal raceway, armoured cable or non- metallic conduit or tubing. Some circuits will require both AFCI and Ground Fault Circuit Interrupter (GFCI) protection. c) A luminaire controlled by a wall switch shall be provided for each room. d) Each stairway with four or more risers must have a luminaire that is controlled by three-way wall switches located at the head and foot of the stairs. If the basement is not finished, then the luminaire is permitted to be controlled by a single switch located at the head of the stairs and provisions for three-way switching must be installed. e) There shall be no more than 12 outlets (lights and receptacles) on any two-wire branch circuit. Kitchen In the kitchen you’ll require circuits and outlets for the refrigerator, range, counter space, finished walls, and lighting. a) Refrigerator – A separate receptacle, supplied from a separate circuit, for the exclusive use of the refrigerator must be installed. There is one exception to this requirement: you may connect a recessed clock receptacle to the refrigerator circuit. Mark the location of the refrigerator receptacle on the floor plan and indicate that the circuit goes directly to the distribution panel. b) Range – A separate receptacle must be located in approximately the centre of the wall space where the range is located (130 mm maximum from the floor and oriented as shown in Figure 2). Mark the location of the receptacle on the floor plan and indicate that the circuit goes directly to the distribution panel. Where a gas (natural gas or propane) piping system or a natural gas connection outlet has been provided for a free-standing, all natural gas range, one receptacle must be located behind the intended natural gas range location, not more than 130 mm from the floor and as mid- point as possible. 6 c) Finished kitchen walls– Receptacles must be installed so that no usable wall space is farther than 1800 mm from a receptacle (see other areas of the dwelling on page 7). Mark the location of these outlets on the floor plan and indicate that the circuit goes directly to the distribution panel. d) Usable counter space – At least two receptacles (15 A - CSA configuration 5-15R, or 20 A - CSA configuration 5-20R) shall be provided for kitchen counters. These receptacles must be installed so that no usable counter space, as measured along the wall line, is farther than 900 mm from a receptacle (excluding the area directly behind the kitchen sink). If you are installing a peninsula or a fixed island in your kitchen you will have to install a receptacle for either or both of these areas if they have a continuous dimension greater than LEFT VERTICAL EDGE OF WALL SPACE INTENDED FOR RANGE RECEPTACLE CSA CONFIGURATION 14-50R RECEPTACLE MUST BE ORIENTED SO THAT U-GROUND SLOT IS ON EITHER SIDE 130 mm MAXIMUM FLOOR LINE APPROXIMATELY ONE-HALF OF WALL SPACE INTENDED FOR RANGE Range receptacle installation - Figure 2 300 x 600 mm. Receptacles located within 1.5 uploads/S4/ residential-wiring-guide.pdf