RE: New lighting wiring

["Marcus Warrington" <marcus.warrington@xxxxxxxxxx>]

The LED's are in the bathroom so are definitely transformer fed (12v
and
on an RCD spur).



Does the minimum load rating still apply with the transformer  and how
do I calculate the load of the transformer ?



If the dimmer is ramped up (i.e. slow start like a LD11 does)  would the
transformer cope with that or would it better to simply "toggle"
between
0% and 100% ?



Marcus

________________________________

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf
Of Richard
Sent: 24 January 2008 10:42
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] New lighting wiring



Transformer based should be ok because the transformer should eat the
leakage current.

The problem are the 230 volt leds because they have a series capacitor
to
drop the voltage so overheat on anything with harmonics.

From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
] On
Behalf Of
Marcus Warrington
Sent: Thursday, January 24, 2008 11:21 PM
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
Subject: RE: [ukha_d] New lighting wiring

Ahh yes, forgot about the *minimum* load requirements of an LD11. :-(

Marcus

________________________________

From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
] On Behalf
Of Neil Ball
Sent: 21 January 2008 17:23
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
Subject: RE: [ukha_d] New lighting wiring

That *may* be ok as the overheating problems/catastrophic failures were
to
do with CFL lamps not LEDs. That said there could be problems if the LED
load is below the minimum load of the dimmer - I've seen LEDs flashing
on/off when the dimmer was supposedly in the off state - was a Lutron
leading edge dimmer from their Homeworks system though so an X10 dimmer
may
have a different effect.

Neil B.

_____

From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
[mailto:ukha_d@xxxxxxx
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
] On
Behalf Of
Marcus Warrington
Sent: 21 January 2008 15:29
To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
<mailto:ukha_d%40yahoogroups.com>
Subject: RE: [ukha_d] New lighting wiring

Ho Hum... I guess my plan to use an LD11, toggled 0% to 100% (by
Homevision) , as a quite relay to turn on some 12v LED bathroom lighting
(running on a 240v transformer) probably isn't a good idea then.

Marcus

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