406.4(D)(2) Non-Grounding-Type Receptacles.

When replacing a non-grounding type receptacle with a GFCI type, the receptacle or the cover plate must be marked “No equipment ground”.

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2020 Changes: 406.12 - Ryan Jackson Electrical Training

No grandfathers here. When you replace you must upgrade.

PPT - Receptacles PowerPoint Presentation, free download - ID:3855181

Leviton 15 Amp SmartlockPro Tamper Resistant GFCI Outlet with Audible Alert, Light Almond GFTA1-T - The Home Depot

What is a Bootleg Ground and Why is it Dangerous?

Receptacle Branch Circuit Design Calculations – Part Four ~ Electrical Knowhow

1National Electrical Manufacturers Association 2011 Tamper-Resistant Electrical Receptacles NEC ® Updates The Opportunity for Continued Child Safety. - ppt download

Replacing Two-Wire Receptacles

No grandfathers here. When you replace you must upgrade.

The Differences Between Grounding and Bonding ― Part 9 of 12

2020 NEC 406.4 General Requirements

What is a Bootleg Ground and Why is it Dangerous?