How are your appliances connected #2
- Thread starter dj-gabriele
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I'll post up some photographs, but in Ireland there would be absolutely no way you could put different utilities into the same cabinet like that.
Gas meters, electricity meters and telephone hook-ups are all kept totally separated.
In apartment buildings they usually group all the electricity and gas meters for each block into cabinets usually located outside the building for ease of access and safety.
Each apartment would have its own meter and a sealed fuse.
On modern houses (post 1960s) the gas and power meters are located outside. Electricity meters are usually in a flush-mounted cabinet sunk into the wall of the house. Gas is normally surface mounted and usually either on the house (near the front) or it may also be located behind a garden wall somewhere safe.
They will not allow you to install new meters of either type in-doors unless it's absolutely unavoidable.
In the last decade or so, telephone connections are also made via an exterior locked flush-mounted small cabinet. The idea being the phone company can test the line in the event of a major fault without actually entering your home and can eliminate your internal wiring from any fault check.
Prior to that, the phone wires usually terminated on a little junction box in your hallway or attic and your internal wiring was connected there.
Link below explains how the power company here wires a new housing development: It's quite easy to follow and details (aimed at building contractors)
Gas meters, electricity meters and telephone hook-ups are all kept totally separated.
In apartment buildings they usually group all the electricity and gas meters for each block into cabinets usually located outside the building for ease of access and safety.
Each apartment would have its own meter and a sealed fuse.
On modern houses (post 1960s) the gas and power meters are located outside. Electricity meters are usually in a flush-mounted cabinet sunk into the wall of the house. Gas is normally surface mounted and usually either on the house (near the front) or it may also be located behind a garden wall somewhere safe.
They will not allow you to install new meters of either type in-doors unless it's absolutely unavoidable.
In the last decade or so, telephone connections are also made via an exterior locked flush-mounted small cabinet. The idea being the phone company can test the line in the event of a major fault without actually entering your home and can eliminate your internal wiring from any fault check.
Prior to that, the phone wires usually terminated on a little junction box in your hallway or attic and your internal wiring was connected there.
Link below explains how the power company here wires a new housing development: It's quite easy to follow and details (aimed at building contractors)
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www.esb.ie
Irish Metering cabinets
Here are the meters:
Gas meter has pipes entering from outside (lower down)
Electricity meter is the larger door (flush)
Telephone hook-up is the small door.
The bulge in the pipe is a pressure safety switch. If the gas leaks in the house, that isolates the supply.
Also, for safety reasons natural gas is supplied at the lowest pressure that is practical for use. It's just high enough pressure to operate the appliances.
Here are the meters:
Gas meter has pipes entering from outside (lower down)
Electricity meter is the larger door (flush)
Telephone hook-up is the small door.
The bulge in the pipe is a pressure safety switch. If the gas leaks in the house, that isolates the supply.
Also, for safety reasons natural gas is supplied at the lowest pressure that is practical for use. It's just high enough pressure to operate the appliances.
Netherlands vs. Ireland:
1. According to ESB guidelines 115V tools are to be used at construction sites in Ireland. I have never seen that equipment here.
2. According to ESB guidelines subterranean cables are to be installed in ducts. That is also a practice that I have never seen here. Electricity and telephone cables are laid in the earth without ducts. The only cables drawn in ducts (more like tubes actually) are glass fibre cables for data traffic.
1. According to ESB guidelines 115V tools are to be used at construction sites in Ireland. I have never seen that equipment here.
2. According to ESB guidelines subterranean cables are to be installed in ducts. That is also a practice that I have never seen here. Electricity and telephone cables are laid in the earth without ducts. The only cables drawn in ducts (more like tubes actually) are glass fibre cables for data traffic.
Yeah, all power tools on building sites here are 110V 50Hz fed by a centre tapped transformer, so they're supplied with 2 lives at about 55V each. The idea is that if the cable's cut you can't get exposed to dangerous voltages. Building sites are by their nature wet and quite dangerous for electrical gear.
You can't use any heavy equipment if it's not 110V, so even for a large job in your own home typically you'd be using 110V equipment.
Only really relatively small DIY drills/tools are 230V
Similar rules apply in the UK
Handheld lamps are limited to an even lower voltage.
Here's a small 'site transformer':
You can't use any heavy equipment if it's not 110V, so even for a large job in your own home typically you'd be using 110V equipment.
Only really relatively small DIY drills/tools are 230V
Similar rules apply in the UK
Handheld lamps are limited to an even lower voltage.
Here's a small 'site transformer':
RCD protection's considered sufficient for normal protection in a building i.e. on normal outlets, but not on a building site. It's considered a far more dangerous environment as it's wet and rough handling can result in a cable or device's insulation being damaged resulting in exposure to live parts.
It's considered safer to simply ensure the devices are not supplied with dangerous voltages rather than only relying on an RCD. US style 110V wouldn't be considered safe either. A site supply is centre tapped 110V which gives you two hots at 55V and no neutral. So, you can't really get shocked with more than about 55V.
The logic is that if you've got long runs of cable, power supplies being sourced from local generators etc that it's just generally safer not to rely on an RCD.
The 110V (55+55V) supply is also RCD protected btw!!
It's considered safer to simply ensure the devices are not supplied with dangerous voltages rather than only relying on an RCD. US style 110V wouldn't be considered safe either. A site supply is centre tapped 110V which gives you two hots at 55V and no neutral. So, you can't really get shocked with more than about 55V.
The logic is that if you've got long runs of cable, power supplies being sourced from local generators etc that it's just generally safer not to rely on an RCD.
The 110V (55+55V) supply is also RCD protected btw!!
CEE standards are a group of European standards for electrical equipment.
e.g. CEE 7/7 is the standard grounded European plug.
Most of the CEE standards were adopted by the IEC (International Electrotechnical Commission) these are now used globally.
There are also EN (Euro Norm) standards issued by CEN/CENELEC [Comité Européen de Normalisation Electrotechnique (European Committee for Electrotechnical Standardization)
e.g. CEE 7/7 is the standard grounded European plug.
Most of the CEE standards were adopted by the IEC (International Electrotechnical Commission) these are now used globally.
There are also EN (Euro Norm) standards issued by CEN/CENELEC [Comité Européen de Normalisation Electrotechnique (European Committee for Electrotechnical Standardization)
The difference in frequency can indeed cause problems. In certain areas of the Netherlands Antilles the voltage is 110-130V and the frequency 50Hz. Appliances like refrigerators and air conditioners that were originally designed for the US market can run on this but the life expectancy is reduced.
So what would use 100hz to 500hz (green)?
So what would 24v 50-60hz be for? (purple) I am guessing a thermostat or low-voltage conrol circuit?
Now the 42v one TRULY is a mystery....powertools? New standards for vehicles? (There was talk of "upping" 12v to 42v.
So what would 24v 50-60hz be for? (purple) I am guessing a thermostat or low-voltage conrol circuit?
Now the 42v one TRULY is a mystery....powertools? New standards for vehicles? (There was talk of "upping" 12v to 42v.
24V and 42V are used at building sites and in agricultural/industrial settings. It is the Netherlands' (possibly in other countries too) equivalent of the UK/Ireland 55V safety power supply. I have also found after some research that 110V is used to control certain hoisting equipment in the Netherlands.
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www.hennyvanommeren.nl
