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1. |
215.6 A new last sentence has been added to refer to 250.32(B) Feeder Equipment Grounding Conductor Where a feeder supplies branch circuits in which equipment grounding conductors are required, the feeder shall include or provide a grounding conductor in accordance with the provisions of 250.134, to which the equipment grounding conductors of the branch circuits shall be connected.
NEW Where the feeder supplies a separate building or structure, the requirements of 250.32(B) shall apply.
250.32(B) has been revised and now has a new exception that allows the grounded conductor to be used for grounding at a separate building or structure for EXISTING buildings or structures where there is no equipment grounding conductor, no continuous metallic paths (between buildings or structures), and no supply-side GFPE.
Question: For an existing building or structure where the following conditions apply the grounded conductor may be used for grounding.
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a)
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There is no equipment grounding conductor
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b)
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There is no continuous metal paths between buildings or structures
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c)
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There is no supply-side GFPE.
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d)
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All of the above
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2. |
215.10 NEW Exception No. 2 Ground Fault Protection of Equipment Exception No. 2: The provisions of this section shall not apply if ground-fault protection of equipment is provided on the supply side of the feeder and on the load side of any transformer supplying the feeder.
This new exception is to clarify that GFPE protection on the primary side of transformers does not meet the intent of this section. Some users have been misinterpreting this section.
Question:
GFPE protection on the ______ side of a transformer can provide protection for feeders, but GFPE protection on the ______ side of a transformer does not provide protection for a feeder on the secondary side of a transformer.
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a)
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secondary, primary
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b)
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primary, secondary
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c)
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either, neither
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3. |
215.12(C) Revised Ungrounded Conductors. A parallel revision to that for branch circuits has been made for feeders. Means of identification of more than one nominal voltage system on the same premises are permitted to be by separate color coding, marking, tape, tagging, or other approved means. Identification shall be by phase and system at all "terminations, connection and splice points." Previously, this said "at all accessible locations."
Question: Where the premise wiring system has feeders supplied from more than one nominal voltage system, each ungrounded conductor of the feeder shall be identified by phase or line and system at all ________, ________ and _________ .
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a)
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accessible, readily accessible, where visible
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b)
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terminal, terminations, splice points
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c)
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termination, connection, splice points
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4. |
220.82(B) and (C) General Loads and Heating and Air-Conditioning Load. This section is under the optional calculation method for dwelling units. It has been revised to make it clear that when a gas dryer is connected to the laundry circuit that is normally used for a washer, no additional load is required to be added in the load calculation. It also clarifies that multi-wire branch-circuits can be used to supply the required two small appliance branch-circuits. See this section for complete details.
Question: If a gas dryer is connected to the laundry circuit in a dwelling unit under the optional calculation ______ load is required.
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a)
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no additional
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b)
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1500 watts additional
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c)
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3000 watts additional
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5. |
220.82(C)(2) Heating and Air-Conditioning Load. This section is under the optional calculation method for dwelling units. It has been revised to require that heat pump loads be
calculated at 100 percent of the nameplate rating when used without any supplemental electric heating. See Code Section for details.
Question: Under the optional calculation method heat pump loads are required to be calculated at _______ percent of the nameplate rating when used without supplemental electric heating.
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a)
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60
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b)
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80
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c)
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100
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6. |
225.18 Clearance for Overhead Conductors and Cables. This section addresses overhead clearances for feeder or branch circuits run as overhead conductors. The word "ground" has been removed from this section to eliminate confusion with the use of "ground" as related to bonding and grounding. Instead the word earth is being used. In addition clearances are now required from grade, platforms, finished grade, projections or levels from which clearances are measured.
Question: Branch circuits or feeders run outside and overhead are required to have the clearances measured from the following: (select the best answer)
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a)
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platforms
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b)
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earth
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c)
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projections
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d)
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finished grade
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e)
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Either a, b, c, or d as applicable.
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7. |
225.22 Exception for Raceways on Exterior of Buildings or Other Structures. Deletion. Flexible metal conduit can no longer be used in wet locations.
Question: Flexible metal conduit can no longer be used in _______ locations.
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a)
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dry
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b)
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damp
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c)
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wet
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8. |
225.39 Rating of Disconnect. The feeder disconnect(s) is required to be rated not less than the calculated load to be supplied, determined in accordance with Parts I and II of Article 220 for branch circuits, parts III or IV for feeders, or Part V for farm loads.
Question: When the branch circuit or feeder disconnecting means consists of up to six switches or circuit breakers the ________rating of switches or circuit breakers shall be permitted.
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a)
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combined
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b)
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individual
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9. |
230.24(B) Vertical Clearance for Service-Drop Conductors. This section addresses overhead clearances for service drop conductors and corresponds to the change made to 225.18 for outside branch circuits and feeders. The word "ground" has been removed from this section to eliminate confusion with the use of "ground" as related to bonding and grounding. Instead the word earth is being used. In addition clearances are now required from grade, platforms, finished grade, projections or levels from which clearances are measured.
Question: Service drop conductors are required to have vertical clearances measured from the following: (select the best answer)
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a)
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earth
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b)
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finished grade
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c)
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platform
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d)
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projection
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e)
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all of the above
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10. |
230.44 Cable Trays. New labeling requirement. Cable trays (containing service entrance conductors) shall be identified with permanently affixed labels with the wording "Service-Entrance Conductors." The labels shall be located so as to be visible after installation and placed so that the service-entrance conductors may be readily traced through the entire length of the cable tray.
Question: Cable trays containing service entrance conductors shall be permanently affixed with labels that state ___________________ .
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a)
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Tray contains service conductors
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b)
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Service-Entrance Conductors
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c)
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Danger-Service Conductors
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