IAEI News – May, 1932 – Vol. IV No. 3

The May 1932 issue is packed with many stories and technical articles from the perspective of almost 90 years ago.

Grounding Multiple Meters (Page 33) An early interpretation of bonding service switches when two, three or four are installed as permitted by the 1931 National Electrical Code.

A Squirrel Story (Page 39) Even back in 1932, squirrels were a possible cause of a power outage.  This one gnawed through the lead sheath. Continue reading

IAEI News – March, 1932 – Vol. IV No. 2

The IAEI March 1932 issue had quite a few great articles including:

Grounding (Page 27) Water Pipe Ground where the secondary is grounded at water pipe at two or more locations outside building served and more.

Portable Light Causes Explosion in Flour Mill (Page 33) Story of a dust explosion of a flour mill when a light bulb broke.

Hazardous Locations Classifications (Page 35) A diagrammatical analysis of the requirements of Article 32 from 1932 regarding classified locations. Continue reading

IAEI News – January, 1932 – Vol. IV No. 1

Inside the January 1932 edition are articles such as:

Four Wire AC Secondary Networks (Page 12)  This extensive article explores the growth (1932 perspective) of AC networks, Radial systems, DC networks, network protectors and more.

Hazardous Locations – Groups (Page 37) “It is recognized that various gases and various combinations of dust, possesses varying characteristics.”  Using Groups for hazard locations is common but back in 1932, the concept was just being introduced. Continue reading

IAEI News – November, 1931 – Volume III No. 6

Many topics such as “new” electric hot water heaters are discussed in the November 1931 issue.

Electric Hot Water Heaters (Page 42) This article reviews the New “electric hot water devices allegedly adaptable for practically any purpose for which hot water was a requirement”

Licensing of Electricians (Page 46) A 1932 perspective about licensing electricians. Continue reading

IAEI News – September, 1931 – Volume III No. 5

The September 1931 issue contains:

Rural Electrification Hazards (Page 3) Rural citizens should be protected from new hazards due to the “Revolutionary Change” brought about by the electrification of farms and small towns.

Electrical Fatality in Oven (Page 25) The victim was repairing an oven in a bakery. He had his head and shoulders in the oven and a frayed extension cord he was using made contact with the metal inside.

Difficult Obtaining Explosion-Proof Motors (Page 31) Back in 1931, explosion proof motors were difficult to obtain as this article explains. Continue reading

IAEI News – May, 1931 – Volume III No. 3

The May 1931 issue contains:

Electric Wires and Hose Streams (Page 11) With the electricity being more prevalent in 1931, fighting fires in the presence of energized conductors becomes a new problem.

Centralized Radio (Page 23) Radio now occupies a position in the modern building comparable to the telephone and the electric light.

Fatal Accident Reports (Page 26) Just as it sounds.  Electrification has its drawbacks. Continue reading

IAEI News – March, 1931 – Volume III No. 2

The March 1931 issue contains:

Polarity Identification of Systems and Circuits (Page 3)  An extensive article about identifying conductors in 1931.

Why 110 Volts is Often Fatal (Page 9) Opinion about why 110 volts is fatal and according to the author is equivalent to 310 volts dc.

Editor’s Comments about Unemployment (Page 10) Interesting read from deep in the midst of the Great Depression. Continue reading

IAEI News – November, 1930 – Vol. II No. 6

The November 30, 1930 issue contains:

Many pages of suggested revisions and additions to the National Electrical Code.  A few examples:

Multiple Service Switches (Page 4) A resolution to consider the subject of eliminating the requirement for a single service switch and permitting multiple service switches.  A.k.a. today’s “Six Disconnect Rule”

Knob and Tube (page 39) Continue reading

IAEI News – September, 1930 – Vol. II No. 5

The September 1930 issue:

Standardization of the investigation of electrical fires and accidents. (Page 3)  With the continued electrification, comes the hazards that go along with it and the committee report on the subject is published in this issue.

Insulation vs. Grounding (page 11) An interesting article about the protection 0f electrical equipment from a safety standpoint.

Motor Wiring Tables (page 27) This table is based on the 1928 NEC

Bare Bus Bars and Risers (page 29) This is quite new and involves many fine points of engineering.  The first large installation was in the Barclay-Vesey Building in New York City. Continue reading

IAEI News – July, 1930 – Vol. II No. 4

July 1930 Issue

In addition to many IAEI section reports, this issue contains articles such as:

How to Classify Hazardous Locations (page 3) “The Classification of Hazardous Locations is a subject which can be treated in little more than a very general manner” Really?  We have come a long way!

Fires in Radio Receiving Stations (Page 13) This article points out some of the causes and accidents. 27 radio fires were reported during 1929 to the New York Board of Fire Underwriters. Continue reading

IAEI News – May, 1930 – Vol. II No. 3

In the May 1930 Issue:

Chicago Civic Opera Dimming System (Page 3) An explanation of this “New” technology used for dimming and control for both stage and a portion of the house lights.

Surface Raceways (page 29) Modern use of electrical applications and lighting such as desk lamps, electrically operated office appliances, TELEGRAPH call systems etc. has created problems for those responsible for the construction of “modern” buildings.

Designation of Enclosed Switches (page 33)  Clarification regarding the three types of switches – disconnecting switches, general use switches and motor control switches.

…and of course, a whole lot more! Continue reading

IAEI News – March, 1930 – Vol. II No. 2

The March 1930 issue contains stories such as:

Adequacy Requirements for Branch Circuit Wiring (page 10) This article points out that the table with a minimum required watts per unit area of the NEC does not of itself assure an adequate wiring layout. This appears to be the predecessor of NEC Table 220.12

Ohio Supreme Court Ruling about Liability (page 25) This 1929 ruling clarifies the right to recover damages from the property owner if they are negligent of fire hazards and his tenants suffer fire losses as a result.

Electrical Accidents Reports (page 29) Fatality from wires that were not removed, Handyman falls and grabs live terminals (all while using a lantern for illumination) Long before NFPA 70E, this article provides many more unfortunate stories.

Steel Underfloor Ducts (page 26) Underfloor ducts as a standardized manufactured produce was almost unheard of until recent years.  This article references only one installation prior to 1920. Continue reading

IAEI News – January, 1930 – Vol. II No. 1

The January 1930 articles include:

What the Industry Thinks of Inspectors (page 3) The electrical industry regards this great body of men in the light of an unorganized police force that undoubtedly contributes to safety in the use of electricity, but instead of keeping order, promotes disorder because it is unorganized.  OUCH!  That’s a bit harsh.

System Control for Electric Clocks (page 10) Did you miss your regular train this morning?  If so, it was not due to an error in your Telechron clock, as its timing is now automatically regulated to a high degree of precision by means of two frequency regulators installed on the Edison system.

What’s in a Name? (Page 15) This article provides example of industry terminology as it relates to specific geographic areas.  For example, “Standpipe” refers to Service Conduit in the North west. “Hard Lights” refer to Arc Lamps in Hollywood. Continue reading

IAEI News – November, 1929 – Vol. I No. 5

November 1929 is the fifth issue and contains articles about:

Application of Demand Factors in Determining Feeder Sizes (page 12) An introduction to the concept of demand factors complete with graphs and tables. “In any set of electrical mains supplying either the whole or a part of an electrical installation the loaded in amperes occurring at anytime rarely, if ever, equals the load in amperes which would be required if all the apparatus connected to these mains was in use at the same time and full loaded.”

Penny for Fuse Proves Costly for Householder.  (page 21) We have heard the stories and they go back a long time ago.  “Don’t use a penny if a light fuse blows out.”

Statement to Inspectors from Manufacturers of Armored Cable (page 30) After tow years of the most careful research by Underwriters’ Laboratories, the armored cable industry announce their adoption of a new armored cable standard. Continue reading

IAEI News – September, 1929 – Vol. I No. 4

The September 1929 issue has quite a bit to offer.

American Standards Association Approves 1929 NEC (page 5) The NEC has been the basic guide for safe practices in the wiring of consumer premises for use or electricity for light, heat, and power for 30 YEARS!

Important Legal Decision (page 7) For inspectors who are enforcing the NEC and others working under the code.  “Using Fixtures Forbidden by National Electrical Code Is Evidence of Negligence.  McIntosh vs. Alabama Power Company.”

Successful Western Section Meeting at Detroit (page 10) “They came by train, they came by auto, they came by boat, and some even came on foot for this meeting. (notice, no airplanes were mentioned) Continue reading

IAEI News – July, 1929 – Vol. I No. 3

From the July 1929 Issue:

The History of the National Electrical Code (page 3) from a 1929 perspective.  This includes a copy of the October 19th, 1881 letter adopting the standard for Electric Light Wires, Lamps, etc. subject to future additions. (Jim’s Note:  I believe there have been “a few” additions since then)

50th Anniversary of the Incandescent Lamp. (page 5) A few rules have been developed related to this incident lamp circuits.  The rules come from then leaders of industry including Mr. Thomas A. Edison.

Voltage Drop (page 8) “Drop in Voltage” has not been specifically provided for in the Code on the assumption that no fire or lie hazard was involved.  However, this article begins to address the issue.

Accident Reports (page 25) This includes the electrocution of a rat, electrocution in a “Beauty Parlor” and others. Continue reading

IAEI News – May, 1929 – Vol. I No. 2

In the May 1929 issue you can find:

Meeting of Electrical Council of Underwriters’ Laboratories Meeting (page 3) that addressed such topics as Cabinet Labels, Armored Cable, Circuit Breakers and more.  Circuit breakers are now divided into three classes based on characteristics.  This includes circuit breakers used for washing machine protection, one for replacing the cutout and the switch at the service entrance and a standard circuit breaker represents the third class.

Guidance for Three-Phase, Four-Wire Systems. (page 8) This type of system is rapidly coming into use throughout the country and this article helps clarify the terminology and application of these systems.

Separate Fuses for Bell-Ringing Transformers.  (page 13) It is recognized that the bell circuit which is frequently run with small size, paraffin covered wire is likely to short circuit.

Neon Signs (page 14) The Neon, sign, with its brilliant attractive, multi-colored glows, has met with very popular favor through the country during the past two to three years.  However, there are many questions that this article attempts to address.

See these articles and many more! Continue reading

IAEI News – March 1929 – Vol. 1 No. 1

In this issue from March 1929 are articles such as:

Talking Picture Equipment – Description of Circuits, Voltages Used and Methods of Installation. With this “NEW” emerging technology, what apparatus must be added to the ordinary motor driven motion picture projector, in order to run talking pictures (page 9).  Learn about the “new” safety provisions governing wiring in moving picture booths and more.  Quite a blast from the past.

High Tension Service In Chrysler Building, New York City (page 17) With the growing tendency toward construction of higher buildings, with the rapidly extending use of alternating currents for buildings in the congest districts of large cities this article discusses the power supply for the NEW Chrysler building.

Read about various meeting reports such as the Electrical Committee of NFPA’s 1929 Annual meeting (page 12) the New York Chapter’s visit to the Westinghouse Institute and a Meeting of the Ohio IAEI (page 15) Continue reading