Kenneth L. Lovorn, PE, Lovorn Engineering Assocs., Pittsburgh
Articles
Four dirty little LED secrets
Specify LED fixtures and create an unhappy client. Here’s what your mother never told you about LED lighting.
Transformer efficiency: Minimizing transformer losses
Matching a transformer to its anticipated load is a critical aspect of reducing energy consumption.
Network controls for electrical systems
Networking of electrical systems has a number of aspects that should be considered.
Key changes in the 2011 NEC
The most recent National Electrical Code (NEC) edition has some important changes.
Designing for selective coordination
By following basic guidelines, both fusible and circuit breaker systems may be selectively coordinated without the engineer ever having to perform a detailed selective coordination study.
Electrical design for HVAC systems
National Electrical Code Article 430 provides maximum protection for the equipment while limiting the nuisance tripping to a minimum. Failure to follow these requirements will not only result in unreliable system operation but will put the pump or fan motor at risk of significant damage in case of an overload or short circuit.
Transients in mission critical facilities
Each of the three transient conditions in an MCF has a different cause, different result, and different method of mitigation.
Guidelines for data center grounding and bonding
Data centers have some very specific and unique requirements for grounding and bonding that differ significantly from the typical electrical distribution system in other types of facilities. These include: Grounding and bonding of equipment in the data center Grounding of the building distribution system Connection of the two systems as required by the National Electrical Code (NEC) Article 250 NEC REQUIREMENTS NEC Article 250 requires that the main electrical service be connected to a grounding electrode. Where available, this grounding electrode must be the metallic, incoming domestic water service line and this connection must be made within 5 ft of the water line entrance into the building.