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#106108 06/20/05 04:16 PM
Joined: Oct 2000
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(submitted via Joe Tedesco)
Quote
Recieved call rooftop heating&cooling unit not functioning. Upon inspection found somewhat of a problem. Brand new unit, old disconnect manually closing switch would not work. Actually had to close knife blades with insulated handles of linemans pliers.
[Linked Image]

[Linked Image]

[Linked Image]

[Linked Image]

2017 / 2014 NEC & Related Books and Study Guides
#106109 06/20/05 07:43 PM
Joined: May 2003
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Whats right? It's off!


Mark Heller
"Well - I oughta....." -Jackie Gleason
#106110 06/20/05 08:32 PM
Joined: Jul 2002
Posts: 8,407
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What's right here?.
Well, the Phase Sequence in the top pic looks to be OK. [Linked Image]
Not a lot else, though.
I see in the bottom pic that this unit has been "modified" since it left the factory, hence the loose Ground wire.
Unbelievable. [Linked Image]

#106111 06/20/05 08:36 PM
Joined: Dec 2000
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Actually had to close knife blades with insulated handles of linemans pliers.

I certainly hope you don't mean that you energized this.

#106112 06/21/05 07:56 PM
Joined: Aug 2001
Posts: 7,520
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Quote
Well, the Phase Sequence in the top pic looks to be OK

Mike,
Take off your Commonwealth thinking cap and put on your American one instead...... [Linked Image]

#106113 06/21/05 08:56 PM
Joined: May 2005
Posts: 247
T
Member
What's right.. hmm.. they used wirenuts.. beyond that, it looks pretty hopeless..

lots wrong with it..


poor workmanship
romex
lack of chase nipple/bushing
lack of connector on flex
improper phase color (assuming 3 phase)
improper phase sequence
improper grounding
inoperative equipment
improperly sized wiring?
did I mention the poor workmanship?

#106114 06/22/05 02:06 PM
Joined: May 2005
Posts: 177
J
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Too bad the black wire wasn't blue, it would have made pic #1 look so much more patriotic (especially when the fireworks start).

I especially like the way the installer so conscientiously left the romex EGC wrapped in paper (pic #3), so it wouldn't "short" to the box.

On a slightly more serious note... judging from pic #4, is this really 3-phase equipment? The white wire wanders out of the picture, unlike the black and red, which are spliced to the unit primary, so maybe it's really a neutral? If so, why the 3-pole disconnect?

#106115 06/26/05 01:24 PM
Joined: Sep 2003
Posts: 123
M
Member
this looks suspiciosly like one of the local HVAC contractors work -- they always alter the equipment to make it work better :eek


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