OVERHEAD SERVICE
Table of Contents - Section 400
PARAGRAPH PAGE
400.0 OVERHEAD SERVICES (0 - 600 VOLTS) (1)
400.1 GENERAL (1)
400.2 IDENTIFICATION OF CONDUCTORS (1)
400.3 MAXIMUM SERVICE ENTRANCE CONDUCTOR SIZE IN RISERS (OVERHEAD) (2)
401.0 CLEARANCES ABOVE GROUND, THOROUGHFARES, DRIVEWAYS,ETC (3)
401.0-1 CLEARANCES ABOVE GROUND (RESIDENTIAL) (3)
401.0-2 CLEARANCES ABOVE GROUND – (INDUSTRIAL & NON-RESIDENTIAL) (4)
401.0-3 CLEARANCES ABOVE GROUND - SERVICES 0 TO 300 VOLTS & 301 VOLTS TO 750 VOLTS..5 401.1 MINIMUM VERTICAL CLEARANCES (SWIM POOLS) (6)
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adware401.2 HORIZONTAL CLEARANCES FROM BUILDINGS (7)茱
401.3 CLEARANCES OVER BUILDINGS AND STRUCTURES (7)
401.3-1 CLEARANCES OVER BUILDINGS . (8)
401.4 POINT OF ATTACHMENT STRUCTURE (9)
401.4-1 ATTACHMENT STRUCTURE (BRACING RISERS) (10)
401.5 ALTERNATE METHOD FOR POINT OF ATTACHMENT (BLOCK STRUCTURE) (11)
401.5-1 ALTERNATE METHOD FOR POINT OF ATTACHMENT (WOOD FRAME STRUCTURE) (12)
401.6 UNIVERSAL SERVICE DROP CONDUIT BRACE (13)
401.7 CLEARANCE FROM DOORS, EXITS, WINDOWS, FIRE ESCAPES, BALCONIES, ETC (15)
401.8 CLEARANCE FROM CATV/TELCO AND ELECTRIC SERVICES (16)
402.0 CUSTOMER SERVICE POLE (17)
402.1 LOCATIONS: (17)
402.2 REQUIREMENTS: (WOOD) (17)
402.2-1 CUSTOMER SERVICE POLE 0 - 300 VOLTS (18)
402.2-2 CUSTOMER SERVICE POLE (19)
402.2-3 CUSTOMER SERVICE POLE REQUIREMENTS (WOOD) (20)
402.3 CUSTOMER
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402.4 SERVICE RISER CONDUCTORS (21)
403.0OVERHEAD 400 AMP C.T./METER CAN (22)
SERVICES
400.0 OVERHEAD
0 - 600 VOLTS
400.1 GENERAL
1. APS RESERVES THE RIGHT TO DETERMINE ALL METER LOCATIONS, INCLUDING
POINTS OF ATTACHMENT, AND ONLY AUTHORIZED APS PERSONNEL SHALL
DETERMINE THIS LOCATION.
2. The height of the point of attachment on the Customer’s building or structure for overhead
rvices shall be adequate to provide vertical clearances between the rvice drop
conductors and the ground as shown in Paragraph 401.0. The rvice attachment height
may have to be higher than the minimums shown in Paragraph 401.0 to maintain
proper vertical clearance between rvice conductors and the ground.
3. Service head and open wires between the rvice head and point of connection to the
rvice drop (drip loop) shall have proper height above ground as shown in Paragraph 401.0.
4. The point of rvice drop attachment on a building shall be located on the exterior wall facing
and nearest APS pole line. The point of attachment shall be insulated.
5. A solid point of attachment shall be provided to withstand a minimum 200 pounds of tension.
The responsibility for furnishing a sufficiently substantial rvice support rests solely with the
Customer. (Lag bolts are not considered acceptable.)
6. Where the rvice conduit rir is ud as a mast for supporting the rvice drop, it shall be 1
1/2" min. size rigid steel conduit and contain no coupling or fittings which would be subject to
strain by the rvice drop. If necessary to u more than one 10' length of conduit, the full
length (10') conduit shall be the upper conduit, thereby putting the coupling below any strain.
EMT or Plastic shall not be ud.
Point of attachment on rvice conduit rirs to be no more than 20" above the top
brace for 1-1/2" rigid steel conduit, no more than 30" above the top brace for 2" rigid
steel conduit and no more than 50" above the top brace for 2-1/2" and larger rigid steel
conduit. See Paragraph 401.4, Paragraph 401.4-1, and Figures 1, 2, 3 and 4. See
Paragraph 401.5 for alternative method for point of attachment.
7. In the event a mast type rir is required to attain the required height, it shall be of such
construction and so supported that it will withstand the strain impod by the rvice drop.
Raceway fittings shall be of a type identified for u with rvice masts.
8. Service rir conduits shall be so located that the corner of the point of attachment for the
毕业演讲稿rvice drop will be within twelve (12) inches of the center of the weatherhead.
9. When multiple rirs are ud leave 36" leads for connection by company.
10. A maximum of three (3) rvice rir conduits may be supplied from one overhead rvice
drop.
11. No foreign attachments shall be permitted on a rvice rir conduit.
12.Overhead raceway (rir) shall not be enclod by any wall.
Note: Attachment tensions greater than 200 pounds may be required in special cas,
such as for bus duct rirs. (Consult APS)
ma是什么意思400.2 IDENTIFICATION OF CONDUCTORS
Any neutral or delta power (high) leg of rvice entrance conductors, provided as required for
various class of rvice, shall be permanently identified. The identification shall be applied on
the open conductors (drip loop) extended from the weatherhead or on the bus-stubs of a bus-duct
rvicehead, whichever is applicable. The neutral shall be white and the delta power (high) leg
shall be orange. (See Section 300, Paragraphs 303.7 and 304.3).
400.3 MAXIMUM SERVICE ENTRANCE CONDUCTOR SIZE IN RISERS (OVERHEAD) Service entrance conductors installed by the customer shall be sized per NEC requirements.
Maximum size conductor shall be 750 MCM with a maximum number of two conductors per
pha.
If rvice rir conductors are to be paralleled, they shall be paralleled in parate conduits.
When metallic (ferrous) conduit is ud or there is any encirclement of ferrous metal, induced
current heating will damage the cable insulation. The only acceptable method is to install one of
each pha conductor and neutral in each metallic conduit (e.g. ABCN of a four wire rvice).
NOTE:
Parallel rvice may be installed in one rir provided the conduit is sized properly per NEC for
the total amount of wire installed. Parallel conductors must terminate on a common bus (e.g. 8
conductors in one conduit for a four wire rvice, 2 - ABCN).
Service drop conductors when not in excess of 300 volts pha to ground, shall have the
following minimum clearance at the lowest point of the span. (The height of the point of
attachment shall be governed by the clearances.) Clearances are bad on conductors
supported on and cabled together with an effectively grounded mesnger.
Crossing over areas accessible to 12.0 ft
Crossing over ............12.5 ft
Crossing over non-residential areas, parking lots, agricultural or other areas subject to truck
< .................18.0 ft
Crossing over non-residential or industrial parking lots, not subject to truck traffic
NOTES 1 & 2......................................................................................................... ................12.5 ft
Crossing over public streets, alleys or roads in urban or rural districts and driveways on
other than 18.0 ft
Crossing over ..............27.0 ft
NOTES:
1. Trucks are defined as any vehicle exceeding 8 feet in height.
2. Truck height must be physically restricted.
3. Minimum height for Drip Loop shall be 10.5 feet.
SPECIAL NOTE:
Where clearance is questionable, plea call APS for instructions before installing rvice
entrance, conduit and other equipment.
It is recommended that an on site meeting be requested with an APS Reprentative to
determine rvice attachment height before installation of rvice entrance, conduit and
other equipment.
401.0-1 CLEARANCES ABOVE GROUND - RESIDENTIAL
大学英语六级报名THESE MINIMUM CLEARANCES APPLY TO THE LOWEST POINT OF SERVICE DROP SAG
不止一次
401.0-2 CLEARANCES ABOVE GROUND - INDUSTRIAL & NON - RESIDENTIAL
THESE MINIMUM CLEARANCES APPLY TO THE LOWEST POINT OF SERVICE DROP SAG.
Figure 2
401.0-3 CLEARANCES ABOVE GROUND
Notes:
1. Trucks are defined as any vehicle exceeding 8 feet in height.
2. If accessible to equestrians, u figure 1.
3. Truck height must be physically restricted.
