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What is the minimum size and material type for a service mast?
2" GRC
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UG line & load conductors shall enter & exit the same side of the socket.
True or False?
False
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What is the maximum number of service risers per building?
6 max, with a single set of conductors in each riser.
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Can load conductors exit through either end of horizontals, back or verticals?
No, NOT the left!
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On lever bypass type housings, load conductors shall exit right or lower rear knockouts.
True or False
True
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Can customer owned conduit be attached to our pole?
No. Not more than 6" above final grade.
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How many feet of customer owned conductor must be coiled at the base of pole?
32'
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How many secondary runs per phase on a 3 phase padmount transformer?
- 8 runs per phase (24 total)
- 750mil aluminum or 500mil copper
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How many days may closed loops be authorized?
7 calendar days. (or temp meter must be installed)
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If we own/maintain the lateral, how many residential units can be grouped at one location?
6 Max
If house meter used, or more than 6 units, the customer owns/maintains lateral.
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What is the max amperage for self contained meters?
400amps then CTs must be used.
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What is the max breaker size that can be used for a 200amp meter?
250amp breaker
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What is the max breaker size for a 320amp meter?
400amp
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In what situation can we install a k-base meter?
No longer allowed per BB.
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What metering rates does Xcel use
- SG-Secondary General
- C-Commercial
- R-Residential
- RD-Residential demand
- PG- Primary General
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Are closed loops allowed on new services?
No.
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Where must the high-leg be located in the meter housing?
In breaker panel?
Per NEC
- In meter housing on the right.
- In breaker panel in the center.
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What is the required size and material of slip sleeves?
Who provides and installs them?
18" in length (9" above & below ground)
- 2 1/2" sched 40PVC or
- 3" sched 80PVC
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How many services will be supplied to a building or other structure?
Only one. Per NEC
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Are jumpers allowed on new services?
No. Only rewires.
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What is the minimum depth of UG service laterals?
24"
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Per Blue Book, can the center knockout (bottom) of the meter housing be used?
No.
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Can knockouts on either side of horizontal or verticle surfaces be used for load conductors?
Yes
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UG temp ground rods will be installed by the customer, not less than 5' from the pedestal. True or False
True
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Can temporary services be attached to trailers or vehicles?
No
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Which of the following must be displayed on a temp?
C. Service address
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What is the Max length of 4/0 conductor from the company pole to a temp?
What is the vertical angle of the drop?
- 70' max
- Must be greater than a 45 degree angle.
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What is the minimum distance a OH temp can be from a company pole?
10'
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UG temp supports shall be where in regards to the utility easement?
Inside? or Outside?
Outside
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How far must UG temp supports be from a pedestal?
- Pole type - 6' min
- Brace type- 5' min
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What are the BB requirements for self-contained meter housings?
- -Steel sockets (no aluminum except on multiple metering)
- -5th terminal in 9:00 position connected with 16AWG wire min.
- -7th terminal connected w/16AWG min
- -Ringless cover, no screws
- -Locking jaw bypass on the right side.
- -Must accomodate a meter seal and padlock.
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What are the ID requirements on the following installations?
Commercial-
Multiple Residential-
Single residence-
- -ID must be a brass, steel or aluminum tag attached to the non-removable portion of the meter socket
- -Unit number must also be permanently marked on the breaker, and entrance to the premise
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What additional BB requirement does a 320amp meter socket have?
Anti-inversion clip on top right terminal.
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When are horn-type sockets allowed?
- On UG 200amp temp housings
- On OH 100 or 200amp temp housings
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What is the required height and width of the following meter housings?
200amp
320amp
- 200amp 19"h x 13"w
- 320amp 26 1/2"h x 13"w
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What 3 additional requirements apply to multiple meter housings?
- - Can be steel or aluminum
- - Must have a permanent barrier to isolate the disconnect switch
- - Each line-side compartment must accomodate a meter seal even if there is no meter present.
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What are 4 Metering Pedestal requirements?
- -Furnished, installed and maintained by customer.
- -Separate covers on disconnect switch, wiring area, and metering area
- -If enclosed, must have a 8"x8" lexan viewing area
- -Door hinged on right or left. (can be top-hinged with prior approval if it can be propped open with a locking mechanism)
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Which of the following structures can meters be attached to?
Mobile homes, construction trailers, fences, manufactured homes.
Only to manufacured homes if on a permanent foundation.
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Meters must be located adjacent to and within line of site of the mobile structure it serves (mobile homes, construction trailers, etc)
True or False
True
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What considerations must be taken into account for determining meter locations?
- -May not interfere with sidewalks, driveways or passageways
- -Can't obstruct doors or windows
- -Can be hazardous or impracticle
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What are the mounting heights for the following?
Single meters-
Indoor multiple meters-
Outdoor multiple meters-
- Single meters- 4'min-6'max
- Indoor multiple meters- 2'min-6.5'max
- Outdoor multiple meters-3'min-6.5'max
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What are the clearances in front of meters?
- 3', 3.5', or 4' deep per NEC
- and 2.5' wide
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When are the following allowed?
-Junction boxes?
-LBs?
-Line & load conductors in the same raceway?
- Junction boxes - with approval
- LBs - with approval
- Line & load conductors in the same raceway - never
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How many runs per single phase transformer?
- -4 runs if greater than 350mil
- -6 runs for residential (4 runs of 350 plus 2 runs of 4/0)
- -8 runs if 4/0 or smaller
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What is the min depth for temp poles?
OH pole circumference.
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What is the min distance a temp support brace can be from the point of attachment?
12"
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Service equipment on temps must be supplied by the company.
True or False?
False. Customer supplies.
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Temp support stakes must be what depth?
12" max
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What size must temp meter sockets be?
11" min.
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What length conductor must be available for termination in an UG ped for a post type temp? (TM20)
36"
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What is the min conductor size in a temp?
min #6
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Do temps need to be cold sequenced?
Why or why not?
As a commercial unit, no need to be if it is one single phase meter, one loop, where the Fault Current is below 10,000 amps
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What is the size and length of liquitite required for temps?
- Min 1", max 1-1/2" diameter
- 12' long
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For OH temps, what is the required height from ground to point of delivery?
12'min 16'max
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What size must temp braces be? (TM30)
- 2"x4" min
- extending 3' min from the base
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Where must the 5th terminal tickler be connected?
Tied to N in meter housing. (Not to ground, as the ground may inadvertently get cut)
Connect 5th terminal 1st, then tie to N to reduce chance of short by having grounded wire flailing around in housing.
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