IBEW HISTORY
Henry Miller
what is the pathagorean theorem ?
A2 + B2= Sq Rt of C2
Who is the godfather of DC Electricity ?
Edison
What is an generic way to figure out fusing size for a transformer ?
Divide Transformer KVA by 5
what is the purpose of tagging systems on utilities ?
The protection of personel
When was the IBEW first formed ?
1891
In a circuit voltage adds in ?
Series
Who is the Godfather of AC electricity ?
Tesla
On a Wye / Delta bank where is the lighting pot located ?
The center
On a bowline knot how much has the rope derated ?
25-40%
What was the death rate of Lineman at the beginning of the trade ?
50%
In a circuit current adds in ?
Parallel
Bright lights in a home might indicate ?
an open neutral
Before Energizing a transformer what must be done first ?
Check voltage
On a wire pull how far away should the puller be from the structure if it is a 100' structure ?
300'
How did Henry Miller pass away ?
He fell from a pole he was working on
how many watts is 25kva
25,000w or 25,000va
If a residence has a voltage drop what can be done to correct it ?
Upsize the service wire size
On a dual bushing transformer does it matter which High Side Bushing gets hooked up to the primary ?
No
All ACSR wire is named after ?
Birds- 556 Parakeet 795 Mallard 1590 Lapwing
When did the Ibew go from the NBEW to IBEW ?
1899
How do you find out the phase to phase voltage of a 7,200 wye system ?
7,200 x 1.73= 12,470
On an electrical circuit what is sympathetic tripping ?
Bonus: what can be done to prevent this ?
When there is an inbalanced load on the line causing a wing pot to trip on the circuit.
Bonus: Float the neutral ONLY DELTA not WYE
On a transformer name plate you often see GY or GRDY what does this mean ?
It is a single primary bushing transformer
What is the proper burial depth for a 100' LD 10 mono pole ?
14' 10% + 4'