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314.29
Wiring to be Accessible
What's Wrong
Here?
Code Q&A
Code Quiz
EC&M Code
Change Conferences
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Top 50 NEC Rules
314.29
Wiring to be Accessible
By Mike Holt
Boxes, conduit bodies, and handhole enclosures must be
installed so that the wiring is accessible without removing any part of
the building, sidewalks, paving, or earth.
Exception: Listed boxes and handhole enclosures can be buried if
covered by gravel, light aggregate, or non-cohesive granulated soil,
and
their location is effectively identified and accessible for
excavation.
Editor's note: This information was extracted from Mike
Holt's
textbook, Understanding
the National Electrical Code
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Code Challenge
What's Wrong Here?
Think you know how this installation violates the
NEC? Visit EC&M's
Web site to see the answer.
Hint: New water feature.
Code Q&A
By Mike Holt
Q. A single main breaker is installed, then taps
supply individual meters with disconnecting means for individual
tenants. Should a main bonding jumper be installed at the single main
breaker or at each separate disconnect?
Visit EC&M's Web
site to see the answer.
Code Quiz
By Steven Owen
Q. What is the maximum allowable ampacity of a
10
AWG THHN or THWN-2 insulated conductor installed in a schedule 80 PVC
raceway (90°C rated) installed underground from the branch-circuit
panelboard to the luminaires installed for parking lot lighting? There
are four current-carrying conductors in this raceway. Disregard the
terminals and the branch-circuit rating for this example.
- 32A
- 30A
- 28A
- 24A
Visit EC&M's
Web site for the answer and explanation.
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than 60 years. Seven Code change conferences have been scheduled in the
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Philadelphia, St. Louis, and Seattle.
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Engineering and Surveying (NCEES), through its Registered Continuing
Education provider Program (RCEPP), professional engineers attending
any
of our 2008 Code change conferences will receive Professional
Development Hours (PDHs), a requirement for re-licensing in many
states.
The conferences are also approved by every state that has a continuing
education requirement for contractors and electricians.
For additional information on the dates and locations of these
events, click
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