Normal lighting and article 517

[david]

Does article 517 clearly state that lighting on the normal branch must be provided at patient bed locations?

Edit.... "In other words ether a critical branch and a normal branch 0r two critical branches must serve outlets at each patient bed location. Does that also include a requirement that lighting installed at patient bed locations must be served by two required branches."....

NFPA 99
6.3.2.2.11.1 One or more battery-powered lighting units shall be provided within locations
where deep sedation and general anesthesia is administered.
6.3.2.2.11.3 The sensor for units shall be wired to the branch circuit(s) serving general lighting
within the room.

 

[david]

The NFPA 99 standard seems to indicate all the lighting branch circuits in the room must be backed up with unit equipment lighting

 

[david]

We are under the 2008 NEC. I find it interesting that 517.63 2008 NEC requires the unit equipment to be on the normal lighting circuit in area served by the wall pack or packs

517.63 2017 NEC gives permission to put the unit equipment on the critical branch in the area served by the wall pack or packs. Does not say unit equipment cannot be placed on the normal branch, just doesn’t mention the normal branch.

However NFPA 99 requires that all lighting branch circuits in the room be backed up with unit equipment.

If someone here knows anyone that is on a committee that looks at this sort of thing in the different NFPA Documents, perhaps you could bring this to the committees attention.

 

[steve66]

Unit equipment is only required where anesthesia is administered. That is typically Operation Rooms and similar rooms.

You don't want a crowed OR with doctors holding scalpels to be completely dark for the 10 seconds it takes for the generator to start.

General care patient bed locations are another story.

 

[david]

Unit equipment is only required where anesthesia is administered. That is typically Operation Rooms and similar rooms.
You don't want a crowed OR with doctors holding scalpels to be completely dark for the 10 seconds it takes for the generator to start.

True but what I am looking at is a inconsistency not necessary a conflict in those operating rooms

NFPA 70 states one required unit equipment backing up a critical branch circuit in a hospital
And NFPA 99 statement that branch circuits suppling general lighting in an OR room must be backed up with unit equipment.

Not confusing general lighting with the normal branch, general lighting in the room since it is not defined would have to indicate lighting branch circuits in general (all of them)

General care patient bed locations are another story.

This section in simplicity states patent bed location outlets shall be supplied by two branches with a design choice of one of them to be a normal branch. This seems to demand that lighting as well as receptacle outlets be supplied from the two required branches at the patient bed location.