Help 100amp service will this be safe

getogrow

getogrow

Well-Known Member
Renfro said:
Yeah I was wondering what you were looking at lol
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i could of swore that one with the red wire was his. i thought i double checked....guess not ....my bad. This is electrical so i should of triple checked. 100% my fault.
 
Renfro

Renfro

Well-Known Member
Go go n chill said:
80 amp sub panel from 100 amp service.... lol
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I have a 125 amp subpanel off my 150 amp service. Typical loading is around 90 amps per leg out of the 100 that's available off the subpanel for continuous use. lol Converted the range/oven, clothes dryer and water heater to natural gas to free up the power. Believe it or not, I have yet to have a main breaker trip event.
 
Go go n chill

Go go n chill

Well-Known Member
Renfro said:
I have a 125 amp subpanel off my 150 amp service. Typical loading is around 90 amps per leg out of the 100 that's available off the subpanel for continuous use. lol Converted the range/oven, clothes dryer and water heater to natural gas to free up the power. Believe it or not, I have yet to have a main breaker trip event.
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You made allocations for it. People need to understand the capabilities of their electric services.
I see sub panels all the time that SAY one thing but can’t handle the load for a number of reasons
 
cobshopgrow

cobshopgrow

Well-Known Member
Renfro said:
Just the cases I have personally seen it holds true that the driver/ballast is more efficient when the line voltage is closer to the output voltage.

View attachment 4790961

Yeah that chart shows a variance of output voltages versus the efficiency but I have seen spec sheets that showed a small difference between 120v, 240, 277 input voltage and the lower voltage (120) was more efficient as it was closer to the target output voltage. Either way, the differences are usually small.

As to the usage of higher voltage to deliver a given amount of watts, it's main savings is in copper as higher amperage feeds require larger conductor diameter.
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i havent seen a meanwell driver working less eifficient with a lower input voltage, PJDiaz is right there.
what youre showing above is the lower the output voltage the less eifficient it is, true especially below 48V.
but we need to consider that the stated 93.5% in your example can just be reached with a higher voltage then 115V.
with 115V he will probably never go above about 90% efficiency (green line).
also often forgotten, when you max out the driver at 115V efficiency takes a small dip over 80% load.
probably the isolating transformer is maxed out, the resistance of the winding comes in to play at this load.
hlg240.png
 
Renfro

Renfro

Well-Known Member
cobshopgrow said:
i havent seen a meanwell driver working less eifficient with a lower input voltage, PJDiaz is right there.
what youre showing above is the lower the output voltage the less eifficient it is, true especially below 48V.
but we need to consider that the stated 93.5% in your example can just be reached with a higher voltage then 115V.
with 115V he will probably never go above about 90% efficiency (green line).
also often forgotten, when you max out the driver at 115V efficiency takes a small dip over 80% load.
probably the isolating transformer is maxed out, the resistance of the winding comes in to play at this load.
View attachment 4827150
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This is from the HLG-240H-54B driver, the one I use around here and the one I stated those facts from:

pf.PNG

As you can see 98% at 115vac and 95% at 230vac
 
Renfro

Renfro

Well-Known Member
I simply stated that the input voltage being closer to the output voltage means the driver has to do less change to the voltage and therefore runs more efficient. As I stated this is something I have seen in other devices but not guaranteed on all.
 
cobshopgrow

cobshopgrow

Well-Known Member
youre refering to the power factor not the efficiency vs. load.
nowhere in the workd you pay for the blind power losses, exept some industrial users who have a extra counter for it installed.
also its the percentage for it is not directly comparable between 115 and 230V.
 
cobshopgrow

cobshopgrow

Well-Known Member
Renfro said:
I simply stated that the input voltage being closer to the output voltage means the driver has to do less change to the voltage and therefore runs more efficient. As I stated this is something I have seen in other devices but not guaranteed on all.
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thats not wrong, but dont fit to the meanwell drivers.
 
Go go n chill

Go go n chill

Well-Known Member
meangreengrowinmachine said:
Ah ha this is what my brother was trying to explain to me... maybe what I need to do is find out which circuits I can load balance against.
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It would make things safer, spreading the loads out across the panel evenly. Just because the car speedometer says180mph it doesn’t mean the engine likes to rev that high ya know? In old homes there are often shiny new panels with zero permit sticker and have “ lots of spaces for breakers” just an accident waiting to happen. Happy growing my friend
 
meangreengrowinmachine

meangreengrowinmachine

Well-Known Member
Go go n chill said:
It would make things safer, spreading the loads out across the panel evenly. Just because the car speedometer says180mph it doesn’t mean the engine likes to rev that high ya know? In old homes there are often shiny new panels with zero permit sticker and have “ lots of spaces for breakers” just an accident waiting to happen. Happy growing my friend
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Thanks man!
 
getogrow

getogrow

Well-Known Member
Go go n chill said:
In old homes there are often shiny new panels with zero permit sticker and have “ lots of spaces for breakers” just an accident waiting to happen. Happy growing my friend
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A guy has to start somewhere. If i just moved into an old home with a shiny new panel, then whats my next step to grow ? How does a guy know whats available ? One quick glance at your post and i assume im full and cannot grow or add anything to my panel.

I understand trying to be safe on a forum but i also understand when someone needs help or has real world questions. We wouldnt need a forum if we all knew electricity.
 
Go go n chill

Go go n chill

Well-Known Member
getogrow said:
A guy has to start somewhere. If i just moved into an old home with a shiny new panel, then whats my next step to grow ? How does a guy know whats available ? One quick glance at your post and i assume im full and cannot grow or add anything to my panel.

I understand trying to be safe on a forum but i also understand when someone needs help or has real world questions. We wouldnt need a forum if we all knew electricity.
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Well, it is like I said several posts ago in this thread call an electrician. If the homeowner could decide the gauge of wire used for his main service then he could also figure out how much current the system could handle and then go from there.
 
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