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JamesI, Developer
Category: Home Improvement
Satisfied Customers: 2085
Experience:  I have a portfolio of renovated houses, including DIY projects from installing bathrooms and new heating systems to rewiring.
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Electrician question... I currently have a DIMTEK 905 energy

Customer Question

Electrician question...
Hi. I currently have a DIMTEK 905 energy management system (input 230v 50-60Hz 32A 1 Phase) that has 12 x 5A outputs.
Connected to one of the 5A output fuses, I currently have connected 3 separate ceiling lights in my hallway. Each one is rated 230V/75W, and each one has one standard lightbulb. These lights are controlled by one one/off switch without a dinner switch.
I am looking to replace the existing three lights with three new light, each having 4 separate halogen bulbs. The new light I was thinking about buying (three of) is rated for 4 x 50w mains halogen (equivalent to approx 300w of normal light). Further details can be found at this URL:
Will these new lights work, or do I need to by some sort of lower wattage alternative? If so, what would be a good substitute?
Thanks for your help!
Submitted: 1 year ago.
Category: Home Improvement
Expert:  JamesI replied 1 year ago.

Hi Bob,

The easiest way to understand how much load (watts) you can put on your lighting circuits is by understanding how load is calculated.

load = voltage x current

In your case you have a 5A circuit running on 230V so that is a maximum load of = 1150W or 1.1KW

You currently only have 3 x 75W = 225W of load connected to a circuit which can handle 5 times that.

By changing to 4 x 50W = 200W of load connected to a circuit which can handle 5 times that, so you have more than enough head room to add another 16 bulbs if you wanted to without any issue.

Please let me know if you need anything clarified.