#	Letters of Interpretation
1	04/18/2014 - 1926.404(b)(1)(iii)(C) - Replacing electrical cords
2	04/04/2010 - 1926.404(b)(1)(iii)(C) - Whether extension cords may be repaired and returned to use.
3	03/22/2005 - 1926.404(b)(1)(ii) - Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors
4	03/22/2005 - 1926.404(b)(1)(i) - Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors
5	03/22/2005 - 1926.404(b)(1) - Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors
6	03/22/2005 - 1926.404(b)(1)(iii) - Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors
7	03/22/2005 - 1926.404(b), 1926.404(b)(1), 1926.404(b)(1)(i), 1926.404(b)(1)(ii), 1926.404(b)(1)(iii) - Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors
8	02/07/2005 - 1926.404(b)(1)(iii) - Requirements of 1926.404(b)(1) application to 208-volt branch circuits; electrical subcontractor requirements under 1926.404(b)(1) to monitor other on-site subcontractors.
9	02/07/2005 - 1926.404(b)(1)(ii) - Requirements of 1926.404(b)(1) application to 208-volt branch circuits; electrical subcontractor requirements under 1926.404(b)(1) to monitor other on-site subcontractors.
10	02/07/2005 - 1926.404(b)(1)(i) - Requirements of 1926.404(b)(1) application to 208-volt branch circuits; electrical subcontractor requirements under 1926.404(b)(1) to monitor other on-site subcontractors.
11	02/07/2005 - 1926.404(b)(1) - Requirements of 1926.404(b)(1) application to 208-volt branch circuits; electrical subcontractor requirements under 1926.404(b)(1) to monitor other on-site subcontractors.
12	07/09/2003 - 1926.404(b)(1)(iii) - CSHO use of external GFCI testers to enforce 29 CFR 1926.404(b)(1)
13	07/09/2003 - 1926.404(b)(1)(ii) - CSHO use of external GFCI testers to enforce 29 CFR 1926.404(b)(1)
14	07/09/2003 - 1926.404(b)(1)(i) - CSHO use of external GFCI testers to enforce 29 CFR 1926.404(b)(1)
15	07/09/2003 - 1926.404(b)(1) - CSHO use of external GFCI testers to enforce 29 CFR 1926.404(b)(1)
16	07/07/2003 - 1926.404(b)(1)(ii) - Use of approved GFCI's that do not have open-neutral protection.
17	07/07/2003 - 1926.404(b)(1)(i) - Use of approved GFCI's that do not have open-neutral protection.
18	07/07/2003 - 1926.404(b)(1)(i), 1926.404(b), 1926.404(b)(1)(ii) - Use of approved GFCI's that do not have open-neutral protection.
19	05/19/2003 - 1926.404(b)(1)(iii)(C) - Repair requirements for the cord plug (attachment plug) of double-insulated tools.
20	05/15/2002 - 1926.404(b)(1)(ii) - Ground fault protection requirements for 120-volt and/or 240-volt circuits.
21	05/15/2002 - 1926.404(b)(1)(i) - Ground fault protection requirements for 120-volt and/or 240-volt circuits.
22	05/15/2002 - 1926.404(b), 1926.404(b)(1)(i), 1926.404(b)(1)(ii) - Ground fault protection requirements for 120-volt and/or 240-volt circuits.
23	06/12/2000 - 1926.404(b)(2) - Electric power tools: grounding, NRTL approval, and suitable circuit connection.
24	10/14/1999 - 1926.404(b)(1)(iii) - GFCI and coverplate requirements in construction;use of fall arrest systems and scaffolding.
25	10/14/1999 - 1926.404(b)(1)(ii) - GFCI and coverplate requirements in construction;use of fall arrest systems and scaffolding.
26	07/20/1998 - 1926.404(b)(1)(ii) - Use of flexible cords for connection of appliances; scaffold base plates.
27	12/09/1993 - 1926.404(b)(1)(ii) - Proper equipment for testing ground-fault circuit interrupters (GFCIs).
28	08/09/1993 - 1926.404(b)(1)(iii)(G) - Extension cord grounding continuity requirements.
29	08/09/1993 - 1926.404(b)(1)(iii)(E) - Extension cord grounding continuity requirements.
30	08/09/1993 - 1926.404(b)(1)(iii)(D) - Extension cord grounding continuity requirements.
31	02/16/1993 - 1926.404(b)(1)(i) - Ground fault protection for a construction job-site trailer.
32	09/17/1992 - 1926.404(b)(1) - Ground-fault protection for branch circuits.
33	04/15/1992 - 1926.404(b)(1) - Requirements for cord sets connected to permanent wiring.
34	02/10/1992 - 1926.404(b)(1) - Ground Fault Circuit Interrupter Information
35	02/04/1992 - 1926.404(b)(1) - Information on ground fault circuit Interrupters
36	04/18/1991 - 1926.404(b)(1) - Extension Cords Connected to Permanent Wiring of a Construction Site Building
37	12/09/1986 - 1926.404(b) - Possible Hazard in the Use of GFCI Worn on an Employee's Belt.
38	11/08/1985 - 1926.404(b)(1)(i) - Marking recognition, regulations and policy of double insulated power tools