Louis Duke

[Esthy]

Today, I saw 2 new A/C condensers on a roof of one of my customers. Each condenser has their disconnect and from each disconnect a 3/4" EMT conduit about 20' long (exposed on a hot roof about 110 degree), and at the end of each metalic conduit, a fitting to continue the run of the conductors in a 12' flexible liquid type to the fused 100 amps subpanel. The conductors for each condenser are AWG 8 and a "BARE" AWG 10. The above apparentely pass inspection (???)
Question: Hot roof, AWG 8 in a 3/4" EMT?....Bare EGC in a EMT?...12' Flexible Liquid conduit?.... Please let me know if I am insane or wrong...and... where in code? I am to astonished to think.

"Second saw". A ranch near the border with Mexico. Main Service Panel replaced by a commercial contractor. MSP installed on wood post, it contain a main 200 amps breaker, one 50 OCD for the well pump and a 100 OCD for the house subpanel. Contractor removed, in the main panel, the bar from the grounding and the neutral, neutral is "floating". House subpanel has a "one neutral/grounding" and several circuits, but one of the conduit leaving the subpanel contains 4 brown ungranded conductors proptected by 4= 20 OCD and ONE NEUTRAL ????

Woooa, it was not my week or..... was it?

 

[iwire]

Question: Hot roof, AWG 8 in a 3/4" EMT?....Bare EGC in a EMT?...12' Flexible Liquid conduit?.... Please let me know if I am insane or wrong...and... where in code? I am to astonished to think.

8 AWG can be placed in 3/4"

A bare EGC is allowed.

12' of LFMC is allowed but should be secured.

 

[peter]

Quote: one of the conduit leaving the subpanel contains 4 brown ungranded conductors proptected by 4= 20 OCD and ONE NEUTRAL ????

Assuming that this house is single phase, it would seem that four circuits and only one neutral would be wrong. However, on second thought, it would be possible that there is a 220 volt circuit involved and that doesn't require a neutral.
~Peter

 

[George Stolz]

Louis, what were the MCA and Max OCPD of the condensers? It could very well be that the ambient temperature was taken into consideration when installed.

Bare EGC in a EMT?

110.14 only prohibits terminations of dissimilar metals, not installing bare conductors into metallic conduit.

12' Flexible Liquid conduit?

LFMC has no prohibition on length, but cannot serve as the equipment grounding conductor when longer than 6' (250.118(6)(d)). LFNC has no prohibition on length if it is LFNC-B (356.10(5)).

Contractor removed, in the main panel, the bar from the grounding and the neutral, neutral is "floating".

If this main panel is the service disconnecting means, then there is supposed to be a grounding electrode system installed at this post (250.50). A main bonding jumper is to be installed (250.24).

House subpanel has a "one neutral/grounding"...

If this means the neutral and grounding bars are one and the same, then this is permitted if the rules of 250.32 are followed.

 

[LarryFine]

one of the conduit leaving the subpanel contains 4 brown ungranded conductors proptected by 4= 20 OCD and ONE NEUTRAL ????

Assuming that this house is single phase, it would seem that four circuits and only one neutral would be wrong. However, on second thought, it would be possible that there is a 220 volt circuit involved and that doesn't require a neutral.
~Peter

Even then, I'd have a problem not knowing which two hot wires are sharing that neutral, in order to not same-phase and overload it.

 

[don_resqcapt19]

Larry,

Even then, I'd have a problem not knowing which two hot wires are sharing that neutral, in order to not same-phase and overload it.

I agree, but the 2005 code does not require conductor identification by phase, only by system.
Don