Hi RVer,
Thank you for reaching us regarding the AC amp rating of the Samsung refrigerator. The marked rating of the extension cord should be AC115-120 V, 10 A, or more.
You can check it on the user manual on page 3.
Here's a link: https://downloadcenter.samsung.com/content/UM/202102/20210208103948291/DA68-02594B-00_UM_RP3000_NA_EN-CFR-MES_201113.pdf.
For further assistance, you may contact us via the following options:
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community:
https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Thank you for choosing Samsung, and have a great day!
ticket number: 1144496505
^Rainly