Supplemental and supplementary grounding electrodes are very similar in name but vastly different in their permitted uses. Understanding the differences in these two electrodes can be critical in providing a safe, Code-compliant installation.
Parallel conductors are often installed where large ampacity feeders or services are used. Total understanding of the paralleling requirements permitted in the National Electrical Code is necessary before attempting to design a large electrical system or install these conductors.
The new type of GFCI employing the latest technology comes with a caveat that must be brought to our attention. Do not get the impression that if this type of receptacle is wired incorrectly that a person cannot be killed or injured.
210.70(A)(1) Lighting Outlets Required Lighting outlet requirements are covered in the last section of Article 210. Branch circuits supplying lighting outlets must be installed in accordance with the provisions in 210.70(A) through (C).
A luminaire is defined in Article 100 as “a complete lighting unit consisting of a lamp or lamps together with the parts designed to distribute the light, to position and protect the lamps and ballast (where applicable), and to connect the lamps to the power supply.” Since luminaires (lighting fixtu
210.70 Lighting Outlets Required The National Electrical Code states its purpose as “the practical safeguarding of persons and property from hazards arising from the use of electricity.” [90.1(A)] The adequacy of the Code is covered in 90.1(B).
CODE CITATIONS Article 210 Branch Circuits Article 220 Branch Circuit, Feeder and Service Calculations Article 250 Grounding Article 334 Nonmetallic Sheathed Cable: Types NM, NMC, and NMS Article 422 Appliances The General Information for Electrical Equipment Directory published by Underwriters Labo
210.70 Lighting Outlets Required Article 210 specifies provisions for all branch circuits except for branch circuits supplying only motor loads. Article 430 contains motor load requirements. Provisions stipulating the placement of receptacle outlets are covered in 210.52 through 210.63.
210.63 Heating, Air-Conditioning and Refrigeration Equipment Outlet Article 210 specifies provisions for all branch circuits except for branch circuits supplying only motor loads, which are covered in Article 430.
If you’re involved with security systems (procurement, design or installation), this article looks at what market segments they may fall in and where you can go to learn more about the “standards” that apply to a product or its installation.
210.52(H) Hallways Article 210 covers branch circuits except for those supplying only motor loads. Motor-load requirements are covered in Article 430. Receptacle-placement provisions are stipulated in 210.52(A) through (H).