Mark Lamendola

Full Coverage of Combustible Coating Equipment 
Article 516 of the NEC applies to things you use every day. Walk into your kitchen for example.
NEC Electrical Requirements for Prefabricated Homes  1
Article 550 generally includes manufactured homes in the term “mobile home” [550.2].
Making Your Way through the Entertainment Industry 
Most of the Art. 520 requirements are in one of four Parts (II, III, IV, and V). Part I provides the general requirements. Part VI provides requirements specifically for dressing rooms, and Part VII is a paragraph we’ll discuss last.
Energy Management Systems and the NEC  1
Not that long ago, it took some doing to convince a building owner to pay for even low-cost energy-saving measures.
The Ins and Outs of Modular Data Centers 
Article 646, one of the new Articles in the 2014 Edition of the NEC, provides the requirements for modular data centers. As with the other new Articles when first introduced, it’s not very long.
Low-Voltage Suspended Ceiling Power Distribution Systems 
Do you know how to correctly install systems that are made specifically for ceiling spaces?
The NEC and Storage Batteries  1
Article 480 provides the electrical installation requirements for all stationary installations of electrical storage batteries.
Wiring Requirements for Marinas and Boatyards 
Article 555 of the 2014 Edition of the NEC provides the electrical installation requirements for various types of marine installations (see Where Do These Rules Apply?).
Generator Design and Installation Guidelines  1
Article 445 of the National Electrical Code (NEC) provides the electrical installation requirements that apply specifically to generators.
Recreational Vehicles and RV Parks 

The NEC Article providing requirements for RVs and RV parks is sandwiched between Art. 550 and 552, Mobile Homes/Parks and Park Trailers, respectively. At 12½ pages, Art. 551 is the longest of the three.

RV vs. the others

To apply the correct Article, you need to know which type of occupancy you actually have.

Article 506: Class II and III Zone System 
We first see the Zone system in Art. 505, which provides this alternative system for Class I locations (the combustibles are gases).
Article 505: Zone Locations
Instead of two Divisions, Art. 505 provides three Zones (see Division vs. Zone). Because the Zone system breaks things down differently from the way the Division system does, it may better suit a given area.
The Ins and Outs of Intrinsically Safe Systems
Rather than being an alternative to the other hazardous location Articles in the NEC, Art. 504 complements them
NEC Article 502: Class II Hazardous Locations
How to apply the rules of Article 502 when there’s risk of fire or explosion due to the presence of combustible dust
NEC Article 501: Class I Hazardous Locations
How to apply Art. 501 when there’s risk of fire or explosion due to the presence of gases or vapors
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