A fax cover sheet from Kaback Enterprises dated September 11, 1998, addressed to the Mayor's Office of Emergency Management.
NYC-WTC_000173262–000173265Folder label: “OEM 7 WTC”
OCR status: ok · source: pdftotext
NYC 9/11 Public Portal Document 09/11/98 13:30 FAX 212 615 3700 COSENTINI ASSOCIATES @005/005
ARTICLE 8 GROUNDING CONDUCTORS 3110
Table 1 System Ground Equipment Grounding and Bonding Conductors
Sizes of Largest Circuit Conductor or Equivalent for Multiple Conductors Size of Grounding or Multiple Services Conductor (AWG) Copper Aluminum Copper Aluminum
12 12 16* 12* 10 8 14* 12* 8 5 12* 10* 6 4 10* 8* 4 to 2 0 8 6 1 or 0 2/0 or 3/0 6 4 2/0 or 3/0__ 4/0 or .250 MCM 2 Over 3/0 to Over 250 MCM 'T 0 350 MCM to 500 MCM Over 3: Over 500 MCM 0 3/0 to 600 MCM to 900 MCM Over 600 MCM Over 900 MCM 2/0 4/0 to 1100 MCM to 1750 MCM Over 1100 MCM Over 1750 MCM 3/0 250 MCM
* Permissible for equipment grounding only but shall not be attached to a circuit conductor. No. 18 copper or No. 14 aluminum wire shall be minimum used for potable or pendsnt equipment grounding if the branch circuit over-cuncnt device does not exceed fifteen amperes.
h. The grounded circuit conductor and/or neutral conductor of an interior wiring system shall not be used for grounding conduit, armored cable, other raceways or equipment. i. Lightning rods shall not be used as grounding conductors. j. Grounding conductors of lightning arresters shall not be smaller than No. 6 and shall meet the same installation requirements as grounding conductors of I interior wiring systems. They shall not be used as system or equipment groun ding conductors.
197
SEP-11-1998 14:30 212 615 3700 P.05 NYC-WTC_000173265
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