b. Ground wires for lightning arresters of all classes, and ground detectors, must not be attached to gas pipes within the building.

c. Where telephone, telegraph, or other wires connected with outside circuits are bunched together within any building, or where inside wires are laid in conduit or duct with electric light or power wires, the covering of such wires must be fire-resisting, or else the wires must be enclosed in an air-tight tube or duct.

d. All conductors connecting with telephone, district messenger, burglar alarm, watch clock, electric time, and other similar instruments, must be provided near the point of entrance to the building with some protective device which will operate to shunt the instruments in case of a dangerous rise of potential, and will open the circuit and arrest an abnormal current flow. Any conductor normally forming an innocuous circuit may become a source of fire hazard if crossed with

another conductor, through which it may become charged with a relatively high pressure. (See Definitions).

e. The following formula for soldering

Definitions of the word APPROVED as used in these Rules, and notice of the approval of certain wires and materials, and the interpretation of certain rules.

RULE 2. CARE AND ATTENDANCE:-

Approved waste cans shall be made of metal, with legs raising can three inches from the floor and with self-closing

covers.

RULE 4. SWITCHBOARDS:

Section a. Special attention is called to the fact that switchboards should not be built down to the floor, nor up to the ceiling, but a space of at least eighteen inches, or two feet, should be left between the floor and the board, and be

tween the ceiling and the board, in order to prevent fire from communicating from the switchboard to the floor or ceiling, and also to prevent the forming of a partially concealed space very liable to be used for storage of rubbish and oily waste. RULE 5.

RESISTANCE BOXES:

Section a. The word "frame" in this section relates to the entire case and surrounding of the rheostat, and not alone to the upholding supports. RULE 8. MOTORS:

Section c. From the nature of the question, the decision as to what is an approved case must be left to the Inspector to determine in each instance.

Section a. The word "frame" in this section relates to the entire case and surrounding of the rheostat, and not alone to the upholding supports.

RULE 10. OUTSIDE CONDUCTORS:

Section a. Insulation that will be approved for service wires must be solid, at

least 3-64ths of an inch in thickness, and covered with a substantial braid. It must not readily carry fire, must show an insulating resistance of one megohm per mile after two weeks' submersion in water at 70 degrees Fahrenheit, and three days' submersion in lime water, with a current of 550 volts and after three minutes' electrification. (See List of Wires, page 202).

Section f. All joints must be soldered, even if made with the McIntyre or any other patent splicing device. This ruling applies to joints and splices in all classes of wiring covered by these Rules. RULE 12. INTERIOR CONDUCTORS:

Section d. Insulation that will be approved for interior conductors must be solid, at least 3-64th of an inch in thickness, and covered with a substantial braid. It must not readily carry fire, must show an insulating resistance of one megohm per mile after two weeks' submersion in water at 70 degrees Fahrenheit, and three days' submersion in lime water, with a current of 550 volts and after three minutes' elec

trification. (See List of Wires, page 202). RULE 13. ARC LAMPS:

Section c. The hand switch to be approved, if placed anywhere except on the lamp itself, must comply with requirements for switches on hanger boards as laid down in Section (g) of Rule 13.

Section f. An approved spark arrester is one which will so close the upper orifice of the globe that it will be impossible for any sparks thrown off by the carbons to escape.

RULE 15. OUTSIDE OVERHEAD CONDUCT

ORS:

Section b. An approved fusible cut-out must comply with the sections of Rules 23 and 24 describing fuses and cut-outs.

The cut-out required by this section must be placed so as to protect the switch required by Rule 17.

RULE 16. UNDERGROUND CONDUCTORS:

Section b. The cut-out required by this section must be placed so as to protect the switch.