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U- 3/4 in non metallic nipple with (2) # 6 THWN
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Akpha Prec��t 'Aly' _ite R�ct 44 SCr� x 27 tr1 x 3 fn : 145,41 ibs '
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minimum 72 in. apart Service disconnect and receptacle are preinstalled by
'. Alpha Technologies with (3) THWN'92 feeders.
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3: 5/8 x 8 copper clad ground `s
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o s' rods +. Gary J.Gifford,Inc.
Electrical Contractor
o `T' 350 SW Linden Street
) _ Stuart,FL 34997
772-286-0954
a. 772-219-0146 fax
giffelec@comcast.net
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Comcast Power Supply Cabinet
U- 2250 W Midway Rd #CATV, Fort Pierce
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Available Fault Current Calculation
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' by:Jchn Sokdik Ver.7.1
Utility Fault Current 11,991 amperes kVA = imp1idsAcomcast.net
E = 240
= kVA x 1000 = trans. FLA trans. FLA = 0
E
has = trans. FLA x 100 x PF PF =
transformer Z Z =
Isca=ampere short-circuit current RMS symmetrical. Isea = 0 amperes
Single Phase 240/120 .
N Point to Point Method
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m Length (distance) FEET L 3
--------------------------=---
��®®�� = 6 Aluminum In Nonmetallic k
I ---------- -------
N 'f 'factor= 2 x L x I (ASC) Isca = 11,991
Co N x C x E I_-N #conductors per phase N = 2
__--r- --
Phase.conductor constant C = 1,482 Phase Conductor
N Volt Line to Line E L-L = 240 Volt
f = 1.214
Neutral conductor constant C = 1,482 Neutral Conductor �6 _
Multiplier Volt Line to Neutral E L-N = 120 Volt
f = 3.642
M = 1
1 + f Line to Line M = 0.452
Line to Neutral M = 0:215
Fault Current at Service Equipment
f
Isca x M = fault current at terminals of main disconnect L- L= 5,416 amperes
0 Isca x M = fault current at terminals of main disconnect L- N = 2,583 amperes
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