Plugging a modern three-pronged 3 cu ft upright freezer into a 1950s outlet using a cheater adapter or a surge protector may not be safe without proper precautions.
Here are some considerations:
Electrical Compatibility: The first thing to check is whether the electrical requirements of the freezer match the outlet's specifications. The 1950s outlet might have a lower amperage rating and may not provide sufficient power for the modern freezer. Using a cheater adapter to connect a three-pronged plug to a two-prong outlet is not recommended and might lead to overheating and potentially cause damage to the appliance or the outlet.
Grounding: The third prong in modern three-prong plugs is for grounding, which is a safety feature that helps protect against electric shock and equipment damage. If the 1950s outlet does not have a proper grounding mechanism, using a cheater adapter won't provide the necessary protection. Using a surge protector with a three-prong plug will not provide proper grounding either if the outlet itself lacks it.
Warranty and Liability: If you use a cheater adapter or a surge protector and something goes wrong, there is a possibility that it could void the warranty of the freezer. Moreover, if damage occurs, it might not be covered by insurance or the manufacturer's warranty due to improper usage.
Upgrading the Outlet: To ensure safety and avoid potential issues, it is best to consider upgrading the outlet to a modern, properly grounded one that meets the electrical requirements of the freezer. This might involve consulting a qualified electrician to assess the situation and make the necessary changes to the electrical system.
In any case, it is essential to prioritize safety and consult a licensed electrician who can assess the specific situation and provide expert advice on the best course of action. Electricity can be dangerous, and it's best to take proper precautions to protect both yourself and your appliances.