Bomzin
Every day on the way to and from I am passed by those who are driving over the speed limit. Just because they are not getting a ticket does not mean they aren’t breaking the law.

On the Mobile, Manufactured and Modular home the two rules that is being violated with the use of SER cable are 550.15 (H) and 550.33.

Before we look at 550.15 (H) let’s look at another section in 550.15.
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550.15 (B) Nonmetallic Cable Protection. Nonmetallic cable located 380 mm (15 in.) or less above the floor, if exposed, shall be protected from physical damage by covering boards, guard strips, or raceways. Cable likely to be damaged by stowage shall be so protected in all cases.

the part of this section that is in bold says that if it is likely to be damaged by stowage it shall be protected. This is why in (H) it states or under-chassis wiring shall be protected. Most people use the space under the trailer for storage of lawn mowers and such.
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550.15 H) Under-Chassis Wiring (Exposed to Weather). Where outdoor or under-chassis line-voltage (120 volts, nominal, or higher) wiring is exposed to moisture or physical damage, it shall be protected by rigid metal conduit or intermediate metal conduit. The conductors shall be suitable for wet locations.
Exception: Type MI cable, electrical metallic tubing, or rigid nonmetallic conduit shall be permitted where closely routed against frames and equipment enclosures.
Notice that the exception that is in bold allows the use of EMT or RNC if it is run against the frame.

None of this matters because of 550.33. Now when we read this section we need to pay close attention to the word insulated as this does not allow a bare conductor that is covered. The equipment grounding conductor in SER is bare and covered by the sheathing.
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550.33 Feeder.
(A) Feeder Conductors. Feeder conductors shall consist of either a listed cord, factory installed in accordance with 550.10(B), or a permanently installed feeder consisting of four insulated, color-coded conductors that shall be identified by the factory or field marking of the conductors in compliance with 310.12. Equipment grounding conductors shall not be identified by stripping the insulation.

I have heard a lot of people say that they have been doing this for years and my reply is, “that doesn’t make it right.”
As I stated earlier in this post about speeding, one cop will let 7 MPH go while another will ticket at 5 MPH over.
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Myself, if I were a traffic cop the ticket would come at one MPH over. Not only that but once I caught you I would be watching you from then on. I love my insurance companies. [Linked Image] [Linked Image] [Linked Image]

Mike