Are there any code restrictions involving in-wall convection ovens?
Best Answer
A stand alone appliance will always come under Underwriters Laboratories jurisdiction. The manufacturer's install instruction will dictate proper guidelines. If a local inspector is involved he can and sometimes does ask for this literature and check things out. Involving a convection oven, I would rigidly follow these instructions and even might error on the side of caution.
After further review, it appears that receptacles and switches are listed for use with crimp terminals. So this installation would not be a violation of NEC 110.3 (B).
National Electrical Code 2014
Chapter 1 General
Article 110 Requirements for Electrical Installations
110.3 Examination, Identification, Installation, and Use
of Equipment.
(B) Installation and Use. Listed or labeled equipment
shall be installed and used in accordance with any instructions
included in the listing or labeling.
2013 UL White Book
Receptacles (RTDV)
Receptacles for Plugs and Attachment Plugs (RTRT)
Terminals
Terminals of a receptacle are permitted for use with certified field-installed
crimped-on wire connectors or an assembly, if so identified by
the manufacturer.
A receptacle may also be provided with conductor leads with factory-installed
crimped-on connectors. Such connectors may be either attached
to the receptacle terminal or are provided with the receptacle in the smallest
unit shipping container and are suitable for use with the terminal of
the receptacle.
Switches (WFXV)
Snap Switches (WJQR)
Terminals
Terminals of a flush snap switch are permitted for use with Listed field-installed
crimped-on wire connectors or an assembly, if so identified by
the manufacturer.
A flush snap switch may also be provided with conductor leads with
factory-installed crimped-on connectors. Such connectors may be either
attached to the flush snap switch terminal or are provided with the flush
snap switch in the smallest unit shipping container and are suitable for
use with the terminal of the flush snap switch.
All plumbing should be inside walls in finished space or it should be installed in a way that protects the joints and protects from punctures.
Who cares? I never heard of plumbing failing because of elbows.
If you wanted this you should have been watching him during it. Or another option is to just write it into the contract so you can set expectation. As it stands you do not know which extra connections were actually needed or not.
4-5. Have local inspector come out to OK it. Don't pay plumber until it passes inspection.
And to answer your question 1, 4, and 5 sound like they are code violations but we don't understand enough to call these violations. For instance I can run pex in a crawl space in Texas, I can run pex in a laundry room outside framing (still not good practice), and you can run plumbing in most places in exterior walls (not good practice and most inspectors would want to see a reasonable level of insulation).
Best Answer
A stand alone appliance will always come under Underwriters Laboratories jurisdiction. The manufacturer's install instruction will dictate proper guidelines. If a local inspector is involved he can and sometimes does ask for this literature and check things out. Involving a convection oven, I would rigidly follow these instructions and even might error on the side of caution.