Identifying neutral conductors grouped in a panelboard or enclosure

Categories: Code change of the week

   This weeks 2014 Code change comes from section 200.4(B) which deals with neutrals grouped in panelboards or enclosures.  Then identifying them so that you don’t mistakenly disconnect the wrong one and send an over or under voltage  to a piece of equipment and possibly burn it up.  This section requires us to identify the neutral conductor for each circuit or circuits it serves.  This is for single circuit or multi-wire circuit. 

   Over the years I have seen electricians working on circuits only to disconnect the neutral to move it around to make room for another neutral conductor, only to disconnect it while the circuit it serves was still energized.  This resulted in a burnt out refrigerator or computer that was on a multi-wire circuit.

   I have seen a few good ways to ID the neutrals by either numbering them with the corresponding circuit number(s) on each neutral or grouping them with a piece of the sheath from NM cable marked with the circuit ID. 

   There are a couple of Exceptions where you can tell which neutral goes with a particular circuit of a cable or conduit installation, or when there just isn’t room to mark the wire in an existing installation where the conductors are pulled through a box or enclosure without splices.

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Till next time work safe be safe and keep an eye on your helper.

Jake

Low Voltage lights around a pool

Categories: Code change of the week

This question has come up several times in the last couple of weeks. How close can I put my low voltage lights near a pool?

Section 680.22,B6 allows us to install LV fixtures closer than 5’ but they have to meet 680.23, A 2  for the type of transformer that is allowed to feed the fixtures.

680.22 B(6) Low-Voltage Luminaires. Listed low-voltage luminaires not requiring grounding, not exceeding the low-voltage contact limit, and supplied by listed transformers or  power supplies that comply with 680.23(A)(2) shall be permitted to be located less than 1.5 m (5 ft.) from the inside walls of the pool.

(2) Transformers and Power Supplies. Transformers and power supplies used for the supply of underwater luminaires, together with the transformer or power supply enclosure, shall be listed for swimming pool and spa use. The transformer or power supply shall incorporate either a transformer of the isolated winding type, with an ungrounded secondary that has a grounded metal barrier between the primary and secondary windings, or one that incorporates an approved system of double insulation between the primary and secondary windings.

LV fixtures at pool

Till next time

Be safe, work safe

Jake

Annex J ADA requirements

Categories: Code change of the week

A new annex has been added to the 2914 NEC Annex J which give us some guidance when dealing with ADA requirements.

You will no longer have to hunt for the ADA requirements for electrical installations, it will be in our Code book.

ADA

Till next time be safe work safe

Jake



Florida Building Code Residential Electrical Code

Categories: News & Stuff

This weeks post comes from the Florida Building Code Residential Electrical code from Chapters 34 through 45.  Inside each chapter they have given us some of the best illustrations that I’ve seen. So every now and then I will pull up one or two to show you.  This one shows the clearances from overhead services to platforms , widows and  the like.  A good illustration on what the code implies (230.9).

Service clearances

Till next time be safe work safe

Jake

Picture of the week 6/10/17

Categories: News & Stuff

This one comes to us from Howard B.  He tells me that we have to keep an eye on the new helpers.

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If you see it send it.

Till next time be safe work safe and keep an eye out for those great pictures.

Jake

2014 Code Change 250.68 (C)(2)

Categories: News & Stuff

This weeks change allows us to use the steel frame of a building in place of running a conductor all around a building.   Bonding each item that needs to be bonded into part of the Grounding Electrode system.  Such as the case of the electrical service on one side of the building and the cold water service on the other.

.250.68 C 2

Till next time be safe work safe

Jake

Picture for this week 5/28/17

Categories: News & Stuff

This one comes from Nate in WPB.

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Yes a fan was hanging from this.

Have a safe Memorial Day.

Till next time work safe be safe

Jake

Picture of the Week 5/14/17

Categories: News & Stuff

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Nice box!!!!!!!!  Not only was there no box but they use NM cable this was in a Hotel Lobby.

Till next time be safe…….

 

Jake

2014 Code Change 250.68(C)(3) Grounding Electrode Connection

Categories: News & Stuff

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In the 2014 NEC they are going to allow us to extend the connection from Grounding Electrode (concrete encased electrode)

into a wall or above grade. In the past we could only have the conductor from the rebar extending out from the concrete

encasement, now we can have the rebar extend out from the encasement for a connection.  So this will work when the

town or city will not let you make this connection in the meter can, and you have a main breakers panel as your first means

of disconnect, you bond the neutral to this electrode in the wall near the panel if needed.  As you can see in the picture on the

right the connection has to be accessible.

 

Till next time be safe work safe.

 

Jake

I don’t know it may be a little close to the ground.

Categories: News & Stuff

Picture of the week

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