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Posted By Topic: SDOC for LED strip light

opplenz
Sep 01 2017 11:21

Hi everyone

We are supplying LED luminaires in New Zealand, we understand that LED strip light bundles featuring a driver requires an SDOC.

We would like some feedback on whether LED strip rolls that don't come with a driver (will use an external driver) need to have an SDOC too?

Thanks,
Alex
   

AlecK
Sep 01 2017 12:17

Yes.
They fit the definition of "light fitting" in list of DMRAs

The separate driver needs its own SDoC
   

BrianW
Sep 01 2017 13:07

Really Aleck.
Without a driver they are nothing more than a 12 or 24vdc strip of leds. No different than can be purchased at Repco or Supercheap for automotive use. I can't imagine why they would need an SDoC.
   

Andrew
Sep 01 2017 14:05

The list is in AS/NZS 4417.2
If it meets the definition then it's a DMRA and needs an SDoC even if there's no good reason for it.
   

AlecK
Sep 01 2017 14:25

Where they are sold doesn't matter.
Where they are installed doesn't matter.
Being ELV doesn't matter
being connected to an "electrical installation" doesn't matter (when sold, they aren't yet connected to anything).

The key part of the description / definition is whether or not it's a fitting of a type
- intended to provide illumination (as against decoration)
- in residential & similar installations.

Some strips will be. Some won't.

And with increasing use of ELV for distribution, eg from PV & batteries, the line could get rather indistinct.

I guess there could be argument about whose "intent" matters; my take on that is it's the fitting designer's / manufacturer's intent and not the purchaser's or installer's.

The other part open to interpretation is "or similar"
I'd suggest lights for living areas of caravans, motorhomes, etc would fit "or similar"
   

mf51to1
Sep 01 2017 19:34

What brand?
   

BrianW
Sep 02 2017 00:03

So you're telling me that the 300 long led strip, running off a gel cell, above my dart board needs an SDoC because it's 'providing illumination' in a 'residential like' situation.

What a load of shit. !!

If that's the ruling then it's ludicrous. The driver I get. It's connected to 230. The fitting, when connected to the driver I get, but the fitting on its own, without the driver, that could easily be run off a battery is just plain stupid, and arbitrarily pedantic.
   

AlecK
Sep 02 2017 09:32

You appear to have missed the point that it isn't where it is installed used that triggers the requirement. The question is whether the fitting was intended for illumination in residential. There are ELV fittings designed / intended / sold for use in houses. There are others that are designed / intended / sold for use in boats , motorhomes etc. Either kind can be used in the other setting,but the SDoC rule hinges on the intended use.

An exact parallel occurs with ELV halogen luminaires - they could be run from an ELV system instead of a 230: 12 V constant-voltage source powered from LV ac. LEDs are no different in principle; although some use constant-current source instead of constant voltage.

You may think it's mad, but as with many rules a line has to be drawn somewhere and that's where this one is drawn.

The rule only affects suppliers; there's nothing that requires an installer to check SDoCs. For most LED fittings, if the suppliers are selling through Supercheap, Repco, etc I'd suggest the intended use is not residential electrical installations. Whereas selling through lite-R-Us would be a clear intent of use in residential. Of course there's nothing to prevent the same fitting being sold through both types of retailer (or through a wholesaler), but despite that I think source could be a useful indicator of intended use.
And if the testing required to show compliance with relevant Standards (to back up the SDoC) is too expensive; the supplier can always include "not intended for use in homes" in the instructions.
   

BrianW
Sep 03 2017 16:54

The problem with that argument is that the 'intended use' statement is utter bullshit. I have led lighting in my horse float that consists of some strip bought of Ali Express and some extrusion and diffuser purchased at Redpaths. I have exactly the same lighting above my kitchen bench, underneath the overhead cupboards, and you're telling me that one light needs an SDoC, as I'm the manufacturer, and the supplier of the light fitting, and the other does not, because of the 'intended use'.
Tell me that you don't think that that's patently stupid.
   

AlecK
Sep 04 2017 08:26

I'm NOT saying one of your lights needs an SDoC and the other identicval one doesn't.
I;'m saying that either both do or both don't; depending on the manufacturer's intended use for the model.

"Intended use" may or may not be the ideal way to draw the line (and I'm not defending it); but it IS the way the line has been drawn. That's not "bullshit", it's a straight reading of the description / definition.




   

BrianW
Sep 04 2017 18:40

Yet another case of the 'rules' not matching the reality.