Standard No.:	GB 14821.1-1993
English Name:	Electrical installations of buildings－Protection against electric shock
Chinese Name:	建筑物的电气装置电击防护
Chinese Classification:	K09    Hygiene, safety and labor protection
Professional Classification:	GB    National Standard
ICS Classification:	91.120.40 91.120.40    Lightning protection 91.120.40
Source Content Issued by:	AQSIQ
Issued on:	1993-12-29
Implemented on:	1994-10-1
Status:	superseded
Superseded by:	GB 16895.21-2004 Electrical installations of buildings - Part 4-41: Protection for safety - Protection against electric shock
Superseded on:	2005-2-1
Abolished on:	2005-02-01
Target Language:	English
File Format:	PDF
Word Count:	10000 words
Translation Price(USD):	250.0
Delivery:	via email in 1 business day

This standard specifies the requirements for protection against electric shock of electrical installations with nominal voltage power frequency AC l000 or below and DC l500V or below and the application requirements of protective measures. This standard is applicable to electrical installations in dwellings, industrial, agricultural and commercial buildings, public buildings, activity buildings, tourist cars and similar areas and to temporary installations in construction sites and exhibition halls. This standard is not applicable to electric traction equipment, electrical equipment for vehicle, ship and aircraft, public road lighting installation, mining installation, anti-jamming equipment (unless this equipment influences on the safety of the installation), and building lightning protection.

1 Subject Content and Application Scope 2 Normative References 3 Terms 4 General Requirements for Protection against Electric Shock 5 Protection of Direct Contact and Indirect Contact 6 Protection against Direct Contact 7 Protection against Indirect Contact Appendix A Relationship between AC Expected Contact Voltage and the Longest Cutoff Time (Reference) Appendix B Floor and Wall Resistance Measurement (Reference) Additional Explanation