525.23 -- GFCI
Less Than the Sum
of Its Parts
Wisconsin Adopts 2005 NEC
Grounding vs Bonding Seminar
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Top 2005 Code Changes
525.23 -- GFCI Protection
By Mike Holt
This section was extensively rewritten to clarify where
GFCI protection is and isn't required, and where it isn't permitted.
(Note: Code text has been paraphrased.)
What the Code says:
GFCI Protection Is Required. Ground-fault protection can be an integral
part of the attachment plug or located in the power-supply cord, within
12 in. of the attachment plug. Listed cord sets incorporating
ground-fault circuit-interrupter for personnel can be used to meet this
(1) GFCI protection is required for all 15 and 20A, 125V
type receptacles used for disassembly and reassembly of amusement rides
and attractions, or readily accessible to the general public.
(2) GFCI protection is required for all equipment that is readily
accessible to the general public if it is supplied from a 15 or 20A,
125V branch circuit.
(B) GFCI Protection Not Required. GFCI protection is not required
for receptacles of the locking type.
(C) GFCI Protection Not Permitted. GFCI protection is not permitted
for egress lighting. (Text new to the Code is underlined.)
Behind the change: The purpose of not permitting egress
lighting to be GFCI protected is to ensure that exit lighting is
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Less Than the Sum of Its
Some time ago we made a service call to an older
residence that had lost one leg at the meter. When the power company
service man checked his voltage at the mast, he had full voltage. I had
him cut the service drop loose, and we pulled the wiring out of the
riser. Three blue wire nuts were connecting four approximately 2-foot
pieces of 6 AWG TW wire together on the same phase. The two middle
pieces of wire were black and white while the end pieces were both red.
Needless to say, we upgraded the service, and I saved the wire for some
time just to show others that times could be a lot worse than they are.
Send your 200-word story to us and it may
appear in a future issue of CodeWatch. Authors of stories chosen will
Cool Electronic Cabinets
Stop electronic control downtime due to heat, dirt and moisture. UL
Listed Cabinet Coolers produce 20 degree Fahrenheit air from an
supply of compressed air to cool electrical controls. Thermostat
minimizes air usage. Maintains the NEMA 4, 4X (stainless steel) and 12
rating of the enclosure. Web site offers detailed information,
downloadable drawings and PDF literature.
What's Wrong Here?
By Joe Tedesco
Got a guess for how this installation violates the NEC?
Web site to see the answer.
Hint: We don't need no stinking permits!
By Mike Holt
Q. I'm working on an electric gate installation.
Can I install control wiring in the same raceway with electrical power
Visit EC&M's Web
site to see the answer.
By Steven Owen
In Class II, Div. 1, hazardous (classified) locations,
where provisions must be made for limited flexibility of wiring
which of the following wiring methods is not permitted?
- Flexible cord listed for extra hard usage that has an
additional conductor for grounding and is provided with listed bushed
- Liquidtight flexible nonmetallic conduit with listed fittings
- Liquidtight flexible metal conduit with listed fittings
- Flexible metal conduit with listed fittings
- Interlocked armored Type MC cable with an overall jacket of
polymeric material and provided with termination fittings listed for
Class II, Div. 1 locations
Visit EC&M's Web
for the answer and explanation.
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Visit www.NECcode.com and stay
current with important industry issues.
Code News Updates
The 2005 NEC officially took effect in the state of
Wisconsin on Sept. 1, but with a few notable omissions. In addition to
deleting 210.12 on AFCIs, the state also opted to remove the NEC
requirement for concealing nonmetallic sheathed cables in non-dwellings
of Type III, IV, or V construction within walls, floors, or ceilings
that provide a 15-minute finish rating. The state adopted the 2002 NEC
in May 2003.
Finding AFCI Common Ground
Requirements for AFCIs continue to divide state
electrical boards, as Wisconsin once again left 210.12 out of its
version of the NEC. What could be done to make the requirements
acceptable to everyone? Write to us at email@example.com
to give us your thoughts.
There are less than four months left in the year and less than 20
states have adopted the NEC so far, but nearly two-thirds of CodeWatch
readers are still confident their state will make the move before the
year turns over.
Shows and Events
Grounding and bonding of electrical systems, sensitive
electronic, and communications equipment is the most important and
understood activity in the electrical, data processing, and
communications industry. At four two-day seminars, Code expert Mike
will explain the basics as well as the advance concepts necessary to
understand the practical grounding and bonding rules in the NEC for
systems not over 600V. Download
the conference brochure for specific dates and locations.
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