Dear all. I have task to calculate the quantity of lighting fixture in new chemical plant. My plan is to proceed it with this below formula.
N = (E*A)/(F*U*M)
N : number of lights required for lighting equipment (unit)
E : required lux total (lx)
A : area of illuminated surface (m2)
F : lumen...
Hi everyone. I have a 132 kW motor with a star-delta starter. Full load amperage is 230A. I'm still confused about setting the timer relay. can you tell me how long it takes to switch the star connection to a delta motor to work safely? are there any standards regulate this issue?
Dear All
I have transformer 1000kVA 6600/400V with FLA 1445A. I want to use bus duct for secondary side. is there any regulation inform the minimum size of the busduct. example like cable, the ampacity should be 1.25 rated load. how about bus duct? my vendor propose busduct with rated current...
Till now, i am still confuse to decide size breaker for new MCC Panel or Distribution Panel.
Should i choose size breaker with 100% load factor or 80% only? Is there any standard that mention the safety load factor to design a Panel? And do you have any template load demand calculation for MCC...
Yes, we have national electrical standard. But my problem is during engineering step, it is difficult to me to interpret it in detail drawing like detail electrical support.
Is there any reference that can guide me to design electrical construction drawing such as section drawing of cable way support, conduit, or grounding layout. Basically, I don't have civil knowledge. So, it's difficult to me execute this type of document.
