Cooper Bussmann CT02MAN manual Circuit Arrangement for Rigid Conduit Temperature Rise Tests

Conduit Conduit

Cable Tray

		Right Angle
		Beam Clamp
			To
			Current		UL Listed
To			Source		Conduit Clamp
Current				Cable Tray	(9ZN-1158)
Source
	Test Set-Up			Conduit Clamp Detail

CIRCUIT ARRANGEMENT FOR RIGID CONDUIT

TEMPERATURE RISE TESTS

TABLE III

TEMPERATURE RISE TESTS, CONDUIT CLAMPS

FOR BONDING RIGID CONDUIT TO CABLE TRAY

Test	Test	I2T	Rigid Conduit		Cable Tray		Temp.
Current	Time	mult.					Rise	Condition After Test
Amperes	Cycles	106	Size	Material	Class	Material	°C
36,000	16	344.7	4"	Aluminum	II	Aluminum	19	No arcing or damage
20,900	60.5	441.2	4"	Aluminum	II	Aluminum	70	No arcing or damage
12,100	178	433.3	4"	Aluminum	II	Aluminum	74	No arcing or damage
21,000	20	146.8	4"	Steel	II	Steel	(?)	Zinc melted at point where
								conduit contacted with tray
3,260	900	159.5	4"	Steel	II	Steel	63	No arcing or damage
21,000	30	220	2"	Aluminum	II	Aluminum	21	No arcing or damage
12,100	120.5	294.2	2"	Aluminum	II	Aluminum	59	No arcing or damage
8,000	245	261.1	2"	Aluminum	II	Aluminum	44	No arcing or damage
21,000	14	103.8	2"	Steel	II	Steel	62	Zinc melted at point where
								conduit contacted with tray
12,000	60.5	145.4	2"	Steel	II	Steel	22	Slight arc between
								clamp and tray
3,240	600	104.9	2"	Steel	II	Steel	49	No arcing or damage
21,000	20	146.8	1"	Aluminum	II	Aluminum	20	No arcing or damage
12,200	60.5	150.3	1"	Aluminum	II	Aluminum	24	No arcing or damage
12,100	14.5	35.3	1"	Steel	II	Steel	6	No arcing or damage
8,000	63.5	67.84	1"	Steel	II	Steel	59	No arcing or damage
1,980	44.5	2.9	1"	Steel	II	Steel	1	No arcing or damage
200A FU

	Appendix Sheet 2
Cooper B-Line, Inc	Cable Tray Manual

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