lutely essential in order to get even moderate protection. It has been clearly shown that lightning may at any time or place take a difficult path to the earth rather than travel a distance on a wire to get to an easy path. In practice this means that lightning may go to the ground through a combination fixture in a residence rather than go a few hundred feet to a lightning arrester. The nature of the locality determines where and how far apart arresters should be placed on any individual system.

Under Rule 8, "Motors," this section has been added:

d. Must be, when combined with ceiling fans, hung from insulated hooks, or else there shall be an insulator interposed between the motor and its support.

This rule is to provide for the insulation of motors used to run the horizontal fans now much used in restaurants, etc. It is evident without argument that fixtures carrying these motors should be insulated just as much as fixtures carrying incandescent lights.

Class B, High Potential Systems.-Under Rule 10, "Outside Conductors," section "a," the following clause is added:

A wire with an insulating covering that will not support combustion, will resist abrasion, is at least of an inch in thickness and thoroughly impregnated with a moisture repellant, will be approved for outside, overhead conductors, except service wires.

This rule simply sanctions what has for a long time been common practice, i. e., the use of "weatherproof" wire on pole lines, with rubber-covered wire for services (or wires running into buildings). Practically, the only insulation that can be expected on a circuit run on poles is the insulation afforded by the glass insu

31der eng on wires has no life when sel u de veder, and in ordinary construction it VÄN TAIL asanca between the wire and an The pressure of the tie wire and the swingng f ze zomerctor soca destroy the insulation of any trag i de ostanie, which, as far as the conductor PUTUL S De zy place where insulation is The way advantage of using anything but a Jure vir 20 1 que lhe is to prevent damage from 1 Cissi WA KUY QUIS. However, conskrig de 1inter of ires that have been caused by a aggers desirable to have some covThe irst requirement in this covering weatherproof" insulation seems

unable to rubber insulation for outdoor #is, ne is vaaterproof wire is but little more expensure than bare vire, at is dimost universally used on pole nes. As a matter of fact, there is not much insulation zan tai and fuck paint. We should depend upon de surastive and wet upon the covering of the are for uscation. Much weatherproof wire is no better than bare wire except when perfectly dry, and it should always be treated as bare wire.

Under Rule 12. "All Interior Conductors," a new section has been added, as follows:

À. Must be protected from mechanical injury, when necessary, on side walls by a substantial boxing, retaining an air space of one inch around the conductors, closed at the top, and extending not less than five feet from the floor. Where crossing exposed door timbers in cellars or rooms, the conductors must be attached by their insulating supports to the under side of a wooden strip

not less than one-half an inch in thickness.

res

first part of this section is a very essential rule. ld, of course, be understood that the wires are ough the top of the boxing and through the botthe boxing, when the boxing has a bottom, in ustible insulating tubes.

er Rule 13, "Arc Lamps," section "f," the folis added:

arresters were introduced into use at a time 1 arc lamps were "open" lamps, i. e., so built : top of the globe was open. Within the past three years, enclosed lamps," i. e., lamps a metal case enclosing the works and coming d surrounding the top of the globe, have come host general use for inside lighting, and such hould always be used in new installations in S. The "inverted arc" lamps referred to are which the light, instead of being thrown downin ordinary direct current arc lamps, is thrown against a reflector, so that the lighting is done by reflected light. These lamps are very desirsome classes of lighting, where it is desirable ve the arc itself from the line of sight-though e thus far been but little used in this country. le allows their use as now constructed without "for the present," which means that the under

yet ready to either

the existing forms.

The language used in the code in this connection reminds us to recommend our readers to at all times note very closely the wording of the code in order to distinguish between what may, what should and what must be done.

Class C, Low Potential Systems.-Under section 18, "Conductors," Rule "d" requiring one foot of space between high and low potential conductors wherever they cross one another, is omitted and this rule added:

f. Must be protected from mechanical injury, when necessary on side walls, by a substantial boxing, retaining an air space of one inch around the conductors, closed at the top, and extending not less than five feet from the floor, or by an iron-armored or a metal-sheathed insulating conduit sufficiently strong to withstand the strain it will be subjected to, the inner insulating tubing to extend one-half inch beyond the ends of the metal tube, which must extend not less than five feet from the floor. When crossing exposed floor timbers in cellars or rooms, the conductors must be attached by their insulating supports to the under side of a wooden strip not less than one-half inch in thickness and not less than three inches in width.

This rule is the same one that has been added under section "b" "High Potential Systems," except that for low potential circuits armored conduit is allowed in place of boxing.

Under section 19, "Special Rules," Rule "i" now reads:

i. When from the nature of the case it is impossible to place concealed wire on non-combustible insulating supports of glass or porcelain, the wires may be fished on the loop system, if incased