The Power Company STOPS at the meter base. Everything else is done to NEC (National Electric Code of the US Fire Prevention Association) and governing building code standards by the building owner and his contractor subject to inspection and approval by the local regulatory agency.

 

There seem to be all kinds of ground/neutral in your picture, just like mine.

My son-in-law used to be a line man/transformer installer, he is away right now, will confirm with him when he returns!
Canada installation should be close!!?
Max.

 

How is your neutral grounded at the service panel? Water main or ground rods?
Max.

 

So you have no 3 pin sockets anywhere? Or if you do they do not have a ground conductor?
Measure (meter) the voltage from your neutral and any ground conductor such as a water supply pipe, are you on a main water service, or a well?
Also measure any 120v conductor to the same point.
Max.

 

That is not a single unit family dwelling transformer. 50 KVA will supply several homes or a small business or multi-family dwelling unit. There also is a second fused line power tap going somewhere. Not a typical residential power pole.

There is definitely something missing here that a larger field of view would show. There are 2 power taps going to line fuses. One goes to the 50KVA and the other goes??? The XFMR secondary wiring is not completely shown either.

 

That is not a single unit family dwelling transformer. 50 KVA will supply several homes or a small business or multi-family dwelling unit. There also is a second fused line power tap going somewhere. Not a typical residential power pole.View attachment 187434

There is definitely something missing here that a larger field of view would show. There are 2 power taps going to line fuses. One goes to the 50KVA and the other goes??? The XFMR secondary wiring is not completely shown either.

 

Looks like a Plain Jane Upper HV to Lower LV feed.

 

240VAC X 200A = 48KVA So your power company is being very generous by supplying 50KVA. My 200A panel is supplied by 15KVA and I have a 2000 SqFt all-electric home with 5 tons of heat pump going year-round. I requested 25KVA and was refused and basically laughed at for asking. There is only one service coming off that transformer and yet there are 2 services in the picture of what appears to be a garage and some other structure. Where does the second feed come from? The feeder ariel uninsulated support guy wire is used as the neutral center-tap feed connection which is common since it has minimal if any current on it. There are a second hi voltage power tap and feed fuse going into a conduit down the pole which may be for an underground feeder to a remote pad-mounted transformer sitting on the ground somewhere? So you have High voltage line at top of pole, tap to a fuse that feeds the 50KVA transformers primary winding, L1, L2, and CT going to the house on an aerial secondary feeder, CT connected at the pole to ground and to the aerial guy as Neutral, and secondary feeder going through meter base to house panel, Main breaker in panel for L1 and L2, L1 bus @ 120VAC, L2 bus @120VAC and Neutral bus connected to ground bus and ground bus connected to external ground. Either metal water pipe or driven ground rod. From the panel, any 240V is connected to both L1 and L2 bus and 120V connected to either L1 or L2 and also connected to the Neutral bus for the 2 wire connections. 3 prong receptacles also have a wire to the ground bus for safety grounding.

 

There are 2 power taps going to line fuses. One goes to the 50KVA and the other goes???

What if the transformer primary is fed from two high voltage phases, not one phase and ground nor phase and neutral.
The secondary neutral centre tap is grounded to earth on the along-pole-to-soil wire, and the same centre tap may be also grounded to soil at the meter panel.

 

240VAC X 200A = 48KVA So your power company is being very generous by supplying 50KVA. My 200A panel is supplied by 15KVA and I have a 2000 SqFt all-electric home with 5 tons of heat pump going year-round. I requested 25KVA and was refused and basically laughed at for asking. There is only one service coming off that transformer and yet there are 2 services in the picture of what appears to be a garage and some other structure.

 

What if the transformer primary is fed from two high voltage phases, not one phase and ground nor phase and neutral.
The secondary neutral centre tap is grounded to earth on the along-pole-to-soil wire, and the same centre tap may be also grounded to soil at the meter panel.

[/QUOTI suppose there should be no problem with a three-phase system. However, it would be quite a high voltage primary. But I am not an expert. someone here will give you a better answer. We are in good hands.

 

What is on that pole is one tap to the xfmr and 2nd tap to a single conductor and maybe a ground (hard to tell from the picture) going into a conduit down the pole. Never dealt with a dual-phase input xfmr. I used to specify 3 phase 208V panels on new plant construction to try and keep the 3 phase feed to an operating area as balanced as possible. There were already some large power correction capacitors between us and GA power due to our phases being unbalanced as it was. We also co-genned 3.5MW and sold excess to GA Power on off-peak times and tried to keep them "Happy" with us. That pole looks a bit funny. Usually, the top wire is a lightning suppression ground wire aerial but it appears from the 2 power taps that it might be a 3rd phase? Not much of a power line feed guessing from the wire size unless it is higher than normal 7-12kVA power distribution voltage. And I am simply guessing it is US.

 

What is on that pole is one tap to the xfmr and 2nd tap to a single conductor and maybe a ground (hard to tell from the picture) going into a conduit down the pole. Never dealt with a dual-phase input xfmr.

 

It is the "Neutral" conductor that is attached to ground and carries almost none to 0 current.

 

How is your neutral grounded at the service panel? Water main or ground rods?
Max.

 

The neutral or transformer centre tap, does carry current, it will be the difference of current in L1 L2. The neutral is also the cable catenary wire.
So any 3 pin 120v outlets do not have a ground?
Max.

 

It is the "Neutral" conductor that is attached to the ground and carries almost none to 0 current.

 

e.g. If you have zero current in L2 and a single phase 120v load on L1 of 15amps, the current in the neutral will also be 15amps.
If both L1 and L2 have 15amps current, at the point the neutral current is shared, the neutral current will be 0amps.
Max.

 

The ground rod connection would be From the ground bus inside the panel and is typically a No 10AWG solid bare copper wire similar to the one coming down the power pole to ground. Outside ground rods are typically driven just outside of the interior wall where the panel is mounted and may be seen coming out from under the siding and down the foundation wall to earth. Ground connections to the rod can be buried below grade. Metal water pipe ground connections are typically inside where the pipe exits the building as close to the panel as possible.

 

Looks like a Plain Jane Upper HV to Lower LV feed.