ᐅ Empty conduit pipes for electrical installation in the basement level
Created on: 19 Apr 2018 12:51
J
JumpY
Hello everyone,
I am helping with the construction of a new house for my brother. The house will be built by a prefab house company, but only from the basement ceiling upwards. The house will be a type of bungalow, and the company will handle all the installation and setup of heating, electrical work, etc., in the upper living area.
The basement is made of prefabricated concrete elements that are placed on the foundation slab. The ceiling is also a semi-precast element that is simply laid in place. Afterwards, the ceiling is poured together with the exterior walls.
We have created a plan in advance for how the basement should be designed. Only two rooms will have flush-mounted wiring, but all lighting fixtures—except those in the garage—will be flush-mounted. In the office room, the “main” installation wall with numerous connections will be built as a drywall partition to make it easier to install the boxes, etc. (The rest of the empty boxes are already embedded in the walls with conduits protruding.)
Now I need to order empty conduits very soon for the office and the hallway, as well as for all the lighting fixture boxes. The lighting boxes will be pulled upward into the ceiling, then routed toward the utility room into the distribution cabinet. All flush-mounted switches, roller shutter switches, room thermostats, etc., will also be situated there. Later, a home automation system will take over controlling heating and shutters; the standard light switches will simply be bridged in the distribution cabinet to allow for possible modifications or controls—since you never know what might be needed.
Can anyone with experience advise me on which conduit diameters and types I should use? I am aware of the challenges when pulling cables; I would generally not use conduits smaller than M20, but how much can really fit where? For example, do 2x twin CAT7 cables fit through an M25 conduit? What about twin satellite cables in an M20 conduit? I find it difficult to estimate this but don’t want to oversize everything unnecessarily.
Is it correct that power cables must be installed separately, but CAT7 and satellite cables could share one conduit if needed, and for example, roller shutter switches or room thermostats could also share a conduit?
I’ve been looking at the Fränkische conduit system but haven’t been able to clearly identify which is the “simplest” conduit suitable for concrete there. I have wholesale prices for various types—for example, one called “UNI-EFMPZ25” that costs only half as much as Fränkische’s but is also suitable for concrete and includes an optional pull wire. (Otherwise, Kati-Blitz.) Does anyone know this conduit, or will some say “nothing works but Fränkische”? That is the only alternative the wholesaler offers, but I definitely don’t want to spend 100 hours later just because the conduits have a terrible inner coating or similar issues.
Attached is a house plan in case anyone wants to take a look. I would be very grateful for any help. Then I could install the conduits next week, pour the concrete, and afterward start with the electrical installation. (Don’t worry, an electrician will perform the final inspection, but I’m capable of pulling cables myself 😉)
I am helping with the construction of a new house for my brother. The house will be built by a prefab house company, but only from the basement ceiling upwards. The house will be a type of bungalow, and the company will handle all the installation and setup of heating, electrical work, etc., in the upper living area.
The basement is made of prefabricated concrete elements that are placed on the foundation slab. The ceiling is also a semi-precast element that is simply laid in place. Afterwards, the ceiling is poured together with the exterior walls.
We have created a plan in advance for how the basement should be designed. Only two rooms will have flush-mounted wiring, but all lighting fixtures—except those in the garage—will be flush-mounted. In the office room, the “main” installation wall with numerous connections will be built as a drywall partition to make it easier to install the boxes, etc. (The rest of the empty boxes are already embedded in the walls with conduits protruding.)
Now I need to order empty conduits very soon for the office and the hallway, as well as for all the lighting fixture boxes. The lighting boxes will be pulled upward into the ceiling, then routed toward the utility room into the distribution cabinet. All flush-mounted switches, roller shutter switches, room thermostats, etc., will also be situated there. Later, a home automation system will take over controlling heating and shutters; the standard light switches will simply be bridged in the distribution cabinet to allow for possible modifications or controls—since you never know what might be needed.
Can anyone with experience advise me on which conduit diameters and types I should use? I am aware of the challenges when pulling cables; I would generally not use conduits smaller than M20, but how much can really fit where? For example, do 2x twin CAT7 cables fit through an M25 conduit? What about twin satellite cables in an M20 conduit? I find it difficult to estimate this but don’t want to oversize everything unnecessarily.
Is it correct that power cables must be installed separately, but CAT7 and satellite cables could share one conduit if needed, and for example, roller shutter switches or room thermostats could also share a conduit?
I’ve been looking at the Fränkische conduit system but haven’t been able to clearly identify which is the “simplest” conduit suitable for concrete there. I have wholesale prices for various types—for example, one called “UNI-EFMPZ25” that costs only half as much as Fränkische’s but is also suitable for concrete and includes an optional pull wire. (Otherwise, Kati-Blitz.) Does anyone know this conduit, or will some say “nothing works but Fränkische”? That is the only alternative the wholesaler offers, but I definitely don’t want to spend 100 hours later just because the conduits have a terrible inner coating or similar issues.
Attached is a house plan in case anyone wants to take a look. I would be very grateful for any help. Then I could install the conduits next week, pour the concrete, and afterward start with the electrical installation. (Don’t worry, an electrician will perform the final inspection, but I’m capable of pulling cables myself 😉)
The Franconian fby-el-f 25 conduit is usually sufficient even for concrete.
I installed it myself in my new build, and not a single pipe failed!
As the bricklayer said, if a conduit gets crushed, then so will the FFKuS-EM-F. The key is to be careful during installation and when concreting/vibrating.
I installed it myself in my new build, and not a single pipe failed!
As the bricklayer said, if a conduit gets crushed, then so will the FFKuS-EM-F. The key is to be careful during installation and when concreting/vibrating.