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Electrical System 120 Volt AC and 12 Volt DC – Part 1

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11.A.1 – Power Cord Inspected YES NO NI NP
11.A.2 – Power Source 15/20 Amp single 120V Line 30 Amp single 120V Line 50 Amp dual 120V lines NP
11.A.3 – Power Cord Condition A F P NI NP
11.A.4 – Electrical Panel Box – Signs of Repair or Service YES NO NI NP
11.A.5 – Electrical Panel Box – Circuit Breakers in Place YES NO NI NP
11.A.6 – Electrical Panel Box – Wiring Discolored from heat YES NO NI NP
11.A.7 – Electrical Panel Box – Wiring Secure YES NO NI NP
11.A.8 – Electrical Panel Box – All Black/Ground/White Separated YES NO NI NP
11.A.9 – Inside Electrical Power Box Condition A F P NI NP
11.A.10 – Fuse Panel Box – Inspected YES NO NI NP
11.A.11 – 12V DC Fuse Panel Box Condition A F P NI NP
11.A.12 – Fuses Condition All Operational Some Blown Not Working NI
11.A.13 – Fuse Connections Condition Good Needs Attention Poor NI
11.A.14 – Wires and Terminals Tight Solid Connection Needs Attention Poor NI


This post is slightly different, I’m showing defaults of each check and the check boxes that are used in my reporting software to ensure everything is checked before end of inspection.

This is 1st part in the series of Electrical things both 120 volts AC and 12 volts DC that are checked.

This post will be a bit more detailed and I will elaborate on things, as some of the things are LSI (Life Safety Issues).

Ok for those of you who are not familiar, there are two electrical systems in your RV:

120V AC – what you would recognize as household electric, this takes CIRCUIT BREAKERS, just like in your house.

12V DC – battery electric, like in your car/truck, these take FUSES.

Ok, from the top:

  1. Power Cord Inspected:  Did we inspect the cord?  Sometimes(yes rare but it does happen), there is no cord to inspect.
  2. Power Source: Let you know what are the electrical requirements for your RV.
  3. Power Cord Condition: Looking at the power cord for damage, both ends and the length of it for broken insulation, etc.
  4. Electrical Panel Box – Signs of Repair or Service:  Does it look like there was any repair or service done to the box?(you will probably know this as the “converter” box).
  5. Electrical Panel Box – Circuit Breakers in Place:  Are any of them loose?
  6. Electrical Panel Box – Wiring Discolored from heat: Finding this can be a serious issue, loose wires, too many amps being pulled, etc.
  7. Electrical Panel Box – Wiring Secure:  Are all of the 120V wires tight, a RV is a rolling earthquake when going down the road and this should be checked on a regular basis.
  8. Electrical Panel Box – All Black/Ground/White Separated:  They all have their own connections and should NOT be connected together.
  9. Inside Electrical Power Box Condition:  How does the box look?
  10. Fuse Panel Box – Inspected:  Checkbox to make sure we checked this.
  11. 12V DC Fuse Panel Box Condition:  What does it look like burned wires, other things?
  12. Fuses Condition:  Fuses all look good?
  13. Fuse Connections Condition:  Connections for fuses are tight, no loose fuses.
  14. Wires and Terminals Tight:  Wiring all tight and nothing loose from 12 V DC side.

Next week will will continue our electrical checks.

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See you next week 🙂