Mark Lamendola

Articles by Mark Lamendola
The NEC and Storage Batteries 
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
Hazardous Locations and the NEC
To correctly understand and apply hazardous location classifications and zones, start with Article 500
Sizing Circuit Protection and Conductors — Part 3 3
Why you size motor circuit conductors and protection differently than you do for circuits of other types of loads
Sizing Circuit Protection and Conductors — Part 2
You don’t size circuit protection and conductors for feeders the same way you size them for branch circuits.
Sizing Circuit Protection and Conductors — Part 1 6
Understanding which NEC ampacity table to use when sizing circuit protection, and how to determine the minimum ampacity of your conductors
Top Tools of Maintenance
When performing predictive maintenance, it's important to use the right tool for the job.
Get to the Root of the Problem
Root cause analysis helps you solve the problem—not just its symptoms.
Join the Discussion on EC&M Talk

EC&M Learning Center

 

Newsletter Signup

 

Search 3.8+ million listings
Connect With Us

Sponsored Introduction Continue on to (or wait seconds) ×