POWER LINE ALARM TRANSMISSION SYSTEMS - PHASE 1 REPORT - POWER SYSTEM CHARACTERIZATION

• NCJ Number: 15605
• Author(s): D L HARDISON; K N DUVALL
• Date Published: 1973
• Length: 222 pages
• Grant Number(s): 72-NI-99-0027; J-IAA-035-2; F04701-72C-0073
• Contract Number(s): 35623
• Sponsoring Agency: US Dept of Justice; Aerospace Corporation
• Corporate Author: GTE Sylvania, Inc
• Sale Source: National Institute of Justice/
• Publication Type: Report (Study/Research)
• Language: English
• Country: United States of America

Annotation

THIS POWER WIRING SYSTEM CHARACTERIZATION SAMPLE STUDY WAS CARRIED OUT ON TWO SINGLE UNIT FAMILY RESIDENCES, ONE MULTI-UNIT SINGLE FAMILY RESIDENCE AND ONE MULTI-STORY BUILDING.

Abstract

THIS STUDY CONCLUDED THAT STANDARD THREE-CONDUCTOR ROMEX CABLE HAS AN IMPEDANCE TRANSFORMING CAPABILITY DEPENDENT UPON THE CABLE LENGTH AND THE TERMINATION OF THE SAFETY GROUND CONNECTOR. SINCE ROMEX IS ONE OF THE MOST COMMON TYPES OF RESIDENTIAL WIRING, THIS IMPEDANCE TRANSFORMING PROPERTY MUST BE DEALT WITH IN ANY ANALYTICAL MODEL TO BE DEVELOPED FOR RESIDENTIAL WIRING SYSTEMS. RESEARCHERS ALSO FOUND THAT THE EFFECT OF THE UTILITY SYSTEM ON THE RESIDENTIAL WIRING SYSTEM IS DEFINITE AND DISTINCTIVE, THE PRESENCE OR ABSENCE OF LOADS ON THE WIRING SYSTEM HAS A DEFINITE EFFECT ON ITS IMPEDANCE, AND THE PRINCIPAL SOURCE OF NOISE IS THE UTILITY SYSTEM. THEY FOUND THAT THE IMPRESSED SIGNAL LEVEL OF A POWER LINE ALARM TRANSMISSION SYSTEM SHOULD BE ON THE ORDER OF AT LEAST SEVERAL VOLTS IN ORDER TO OVERCOME ANTICIPATED SIGNAL ATTENUATION AND NOISE. FOR THE FINAL REPORT, SEE NCJ-17089.