Sep 26, 2016
A multiple-outlet branch circuit is a branch circuit that supplies two or more outlets. With the exception of the required small appliance, laundry, and bathroom receptacle circuits in dwelling units, those outlets may be a combination of lighting outlets for luminaires, receptacle outlets for cord and plug connected utilization equipment...
Sep 08, 2016
Oregon General Supervising Electricians (S) and Limited Supervising Electricians (PS) have a 24-hour Oregon electrical continuing education requirement that has to be satisfied by Saturday, October 1st, 2016. The state of Oregon Building Codes Division requires the 24 hours of Oregon electrical continuing education hours to cover 12 hours of...
Jul 18, 2016
If you are preparing to take an electrical licensing exam, you will need to know how to calculate the feeder or service load for a single family dwelling. Refer to section 220.82(A)&(B) in the 2014 National Electrical Code (NEC). Here is a sample problem. Use the optional calculation to find...
Jun 21, 2016
The requirements for securing and supporting are similar in intent, but there are differences. Securing is done by installing a mechanical means of attachment to the cable and attaching it to a stationary structural member so the cable does not move. This will prevent the cable or conduit from becoming loose and pulling away from a box or fitting. Support requires a mechanical means to prevent the cable from sagging or drooping which may cause damage to the cable and create a hazard. A cable may remain loose while its support is maintained.
Jun 10, 2016
The license renewal deadline for Montana Journeyman electricians, Residential electricians, and Master electricians is July 15th, 2016. All Montana licensed electricians must have the required 16 hours reported to the Montana Department of Labor and Industry State Electrical Board before the deadline in order to renew a Montana electrician license....
May 20, 2016
The 2014 NEC is clear about how cables and raceways must be supported. The general rule in 300.11(A) is that raceways, cable assemblies, boxes, cabinets and fittings shall be securely fastened in place. Cables cannot be used as a means of support for other cables, raceways, or nonelectrical equipment, per 300.11(C)...
Apr 20, 2016
Supply-Side grounded and bonding conductors are sized from Table 250.102(C)(1) in the 2014 NEC. In earlier Codes, all these conductors, as well as the Grounding Electrode Conductor, were selected from Table 250.66. Table 250.102(C)(1) from the 2014 NEC. It is very helpful to have a separate Table for selecting the size of...
Feb 25, 2016
Properly sizing an SE cable installed in thermal insulation requires a careful examination of the Code. Section 338.10(B)(4)(a) is all about interior installations of SE cables and states: Where installed in thermal insulation the ampacity shall be in accordance with the 60°C (140°F) conductor temperature rating. The maximum conductor temperature...
