There has been a large change in the number and nature of electrical devices in the American home since the tables used by NEC® Article 220 Branch-Circuit, Feeder and Service Calculations, were established more than three decades ago. These tables and requirements describe typical lighting and appliance electrical loads that may be found in residences and other occupancies. These figures form the basis for sizing services and feeders to residences. The cumulative effects of the introduction of new technologies, both positive and negative, will be a change in both the average and peak power consumption. The assumptions behind the load calculation methodology of Article 220 need to be reviewed and confirmed.
RESEARCH OBJECTIVE: to validate the basis for the load calculation methodology of Article 220 of the National Electrical Code by developing baseline information on typical profiles of electrical loads in today’s residences.
The Foundation is seeking a project consultant to: review the applicable scientific literature, historical and current code requirements; using available utility data in conjunction with the Project Technical Panel, develop preliminary baseline information on residential electrical consumption; and recommend a detailed next Phase research plan to validate the information with field measurements.
The research program will be conducted under the auspices of the Fire Protection Research Foundation and will be guided by a Project Technical Panel consisting of technical experts, to include representatives of the electrical utility industry, inspectors, contractors, manufacturers and NEC Code Making Panel 2. The Technical Panel will provide input to the project including resources for load information, recommend contractor selection, review periodic reports of progress and research results, and review the final project report.
REPORTING and DELIVERABLES:
The project contractor will provide periodic reporting and communication on all project tasks to the Project Technical Panel and will prepare the following deliverables: a detailed work plan, and draft and final project reports.
Project Milestones and Approximate Schedule:
Proposals Due April 30
Selection of Contractor May 15
Detailed Work Plan June 10
Draft Report November 30
Final Report December 31
If you are qualified and interested, or know of someone that is, please contact:
Standards Management International