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Looked at all the transformers in the Olsen's Train Parts Database CD. In this reference source, only found two cords used - 1011-26 and B-292.

Using 1011-26: 1011, 1012, 1014, 1015, 1016, 1016 1969 Model, 1043, 1043M, 1053, 1063, 1073, LW

Using B-292: 1010, 1025, 1032, 1032M, 1033, 1034, 1035, 1037, 1041, 1042, 1044, 1144, 1241, "A", "Q", KW, RW, RWM, RW250, SW, TW, "V", "Z", VW, ZW, ZW Model R

In the reference, but no cord identifier shown: "R", "RX", "S", TW54

Why ?  very simple  the original Lionel transformers were built before the times of UL approved, before the times of grounded outlets. It was not that long ago then that electricity was still a mystery and the majority of homes did not even have electricity.  Frankly the concept of safety, probably did not occur to anyone, or they would have insulated the outside metal plates.  This is why every transformer we refurbish, not only adds a 3 prong  plug for safety, but also takes care of phasing issues. Common guys common sense works even today.

@TinMan3rail, it has been shown many times by knowledgeable experts on this forum and elsewhere that adding a 3 prong plug and grounding classic Lionel transformers is just outright WRONG and not proper way to achieve safety. I get it, sure, to the layman, it seems like adding a 3rd prong and grounding things is the right thing to do, but then look around, what other train transformers, even current production ones have a ground? See

Furthermore, the current modern UL specifications for Toy Transformers in section 16 of specification 697 state that the cord, plug and unit should NOT be grounded, at least 18 gauge in size, between 5 and 10 ft long and not detachable from the transformer. I can't directly quote the source because it is copyrighted, but you can purchase your own copy:   Also, lets remember, that Lionel classic transformers were UL listed when appropriate.

The correct way to achieve the safety you purport to sell is as simple as using the correct unpolarized plug and introducing an upstream GFI. This can be done by installing a GFI wall outlet, or using a device like this:

I think much could be forgiven if you decided to have the GFI built into your cord, maybe something like this: However, you still should NOT ground the transformer case.

Now, let's not derail this topic any further as the initial intent is to see what plug end moldings were used with what and when with the possibility of creating proper reproduction plugs for use with classic transformer restorations and refurbishments.

Last edited by bmoran4

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