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Cable, Conduit, Connectors and Boxes for Outdoor Wiring in Orillia, Gravenhurst, Bracebridge and Muskoka

Sat, 02/09/2013 - 02:22 — BruceGrant


Cable, Conduit, Connectors and Boxes for Outdoor Wiring

 

Look for NMWU 90 the U stands for underground.


For outdoor and underground wiring, you can use cable suitable for exposure to the elements such as NMWU-90, for direct burial. NMWU 90 wire can encased in conduit (both metal, plastic, or liquid-tite flexible conduit). It is important to check both national and local code rules for outdoor wiring installation requirements.

As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will often find NMD90 instead of the proper U rated wire outside. All NMWU The U stands for underground, has a black sheath of insulation like this example of 14/3.  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will often find NMD90 instead of the proper U rated wire outside. All NMWU The U stands for underground comes on large and very large spools, has a black sheath of insulation like this example of 14/3  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will often find NMD90 instead of the proper U rated wire outside. All NMWU The U stands for underground has a black sheath of insulation like this example of 14/2  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will often find NMD90 instead of the proper U rated wire outside. All NMWU The U stands for underground comes on large and very large spools, has a black sheath of insulation like this example of 14/2
  NMWU THREE WIRE CABLE AND HOW IT LOOKS ON A SPOOL<__both are 14 guage 14_ >NMDU TWO WIRE CABLE AND WHAT IT LOOKS LIKE ON A SPOOL                             
NMWU cable is generally used as feeder to outside post lamps, pumps, and other loads or apparatus outside or on the exterior of a building and is fed from a distribution point in an existing building as specified in the Canadian Electrical Code.

NMWU cable may be used underground, including direct burial.

 

Multiple conductor NMWU cable may be used for interior branch circuit wiring as well as outside in residential or agricultural buildings at conductor temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors) as specified by the Canadian Electrical Code. This type of wire is often found used as a precaution inside in damp locations like pool service and equipment bays, and areas where where showers and spas are located. Voltage rating for NMWU cable is 600 volts.

 Conduit for running cable outside comes in several types

Metal which is not used much outside anymore having been replaced by the plastics that do not need to be protected from rusting, Ridgid or semi ridgid plastics, and the newer flexible plastics that use fewer fittings.

As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I might see metal conduit like this on the exterior of a building, Provided it is protected from rusting this is usually ok.  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will find plastic conduit with the bell fitting ends properly used outside where it is exposed to weather.  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I might see the newer flexible plastic conduit where it can be exposed to weather. With fewer fittings it is a good choice.

 
All outdoor electrical fittings and device boxes must be rated for outdoor use, installed with supplied gaskets and appropriate entrance fittings.

 Inspecting of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will see outdoor boxes like this doubble switch box that is sealed to the elements  When inspecting homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas although I may find metal boxes outside they are designed for outside use and sealed with gaskets against the elements.  As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I see these plastic outlet and switch covers that flip up to use.


Ground Fault Circuit Protection for Outdoor Wiring

Ground fault circuit protection is required for most outdoor electrical circuits so again, check with the local electrical authority for the requirements for your particular outdoor wiring project.

As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas i see these newer sealed units outside.     As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas Aclear cover over the GFCI lets owners see if the unit has tripped yet still protects from weather.i       As an inspector of homes cottages and commercial property in the Orillia, Gravenhurst. Bracebridge and Muskoka areas I will see these heavy duty toggle switch and GFCI combo outside. 

Remember U stands for underground. 
All exterior use Conduit Connectors and Fittings must be rated for damp or wet locations. 


NMWU cable is primarily used for outside use from a distribution point.
NMWU may be used in underground burial.
NMWU temperatures may not exceed 90 degrees centigrade. CSA listed.
Ground fault circuit protection is required for most outdoor electrical circuits