National Bureau of Standards Handbook

International Commission on Radiation Units and Measurements., 1921 - Industrial safety

Transformers induction regulators rheostats ground	35

Scope of the Rules	36

General requirements	37

Illumination	38

Floors floor openings passageways stairs	39

Exits	40

Protective arrangements of equipment 4I 110 General requirement 4I III Inspections	41

arresters except those on signal circuits and of all circuits	42

Character of switches and disconnectors	257

Disconnection of fuses before handling	258

Arcing or suddenly moving parts	259

Switchboards and panelboards	260

Motors and motordriven machinery	262

Electric furnaces storage batteries transformers and lightning arresters	265

Grounding of furnace frames	266

Lightning fixtures and signs	267

Working space about electrical equipment	43

Guarding live parts	44

Isolating live parts by elevation	46

Hazardous locations and deteriorating agencies	47

Rotating equipment	48

Guards for live parts	50

Grounding machine frames	51

Deteriorating agencies	52

Isolation	53

Illumination	54

Lightning arresters	70

Underground lines	76

Scope of rules and general requirements	243

Other methods of construction and installation than those	244

General requirements and compliance with other standards	245

Inspections and repairs	246

Working spaces about electrical equipment	247

Guarding or isolating live parts	248

Hazardous locations	249

Conductors	250

Mechanical and thermal protection	252

Guarding and isolating conductors	253

Guarding in damp or hazardous locations	254

Fuses circuitbreakers switches and controllers	255

Hazardous locations	256

Portable devices cables and connectors not including those for signal lines	270

Electrically operated cars cranes and elevators	273

Telephone and other signal apparatus on circuits exposed by supply lines or lightning	277

Rules to be observed in the operation of electrical equip ment and lines	282

Rules for the employer	287

Protective methods and devices	289

General rules for the employee	291

General operation	294

Handling live equipment and lines	299

Killing supply equipment and lines	303

Making protective grounds	307

Special rules for the employee	308

Overhead line operation	310

Underground line operation	313

Series lamp operation	315

Meter operation	316

Testing operations	317

Tunnel and subway operation	318

Signal line operation	321

Rules for commercial telephone and telegraph systems	323

General rules for the employeesignal systems	325

Special rules for overhead line operation signal systems	328

Special rules for underground line operation signal systems	331

Index	334

Title	National Bureau of Standards Handbook 1956-1964: National Bureau of Standards handbook, United States. National Bureau of Standards Issue 3 of ICRU Report, International Commission on Radiation Units and Measurements
Contributors	International Commission on Radiation Units and Measurements, United States. Bureau of Standards, United States. National Bureau of Standards
Publisher	International Commission on Radiation Units and Measurements., 1921
Original from	the University of Michigan
Digitized	Aug 3, 2009

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