- Feb 25, 2011
- 9,547
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- If you're a qualified, trainee, or retired electrician - Which country is it that your work will be / is / was aimed at?
- United Kingdom
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- Practising Electrician (Qualified - Domestic or Commercial etc)
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- Richard Burns
Check the voltage input limits on the ballasts if they allow a lower voltage then you can go down to that voltage as a product standard applies. However do not push it too far or you will get lamp failure.
From my calculation (admittedly using 0.95 PF because 0.36 sounds very low) and disregarding all other issues of starting inrush current, etc.
Then the volt drop assuming ~half are 10m apart and ~half 15m apart and that the three twin fittings are at the end is about 12V and a basic ballast may allow input down to 200V. so you are well within limits.
From my calculation (admittedly using 0.95 PF because 0.36 sounds very low) and disregarding all other issues of starting inrush current, etc.
Then the volt drop assuming ~half are 10m apart and ~half 15m apart and that the three twin fittings are at the end is about 12V and a basic ballast may allow input down to 200V. so you are well within limits.
