Hello to all home builders and possibly also to electrical experts,
Since I haven’t found anything about this online or in forums, I’m posting the question here again.
We have contracted the interior work through the general contractor, which unfortunately includes the electrical planning. Of course, the standard package does not include any LAN cabling, which the electrician charges extra for. Is a price of 300 gross for positioning the CAT7 cable and pulling it through a house with a floor area of 130 sqm (1400 sq ft) reasonable or too expensive? (Only one LAN cable; the price doubles for two.) Terminating the data cables and installing the network outlets is charged separately.
We are getting a prefab house (timber frame) with a ground floor and an upper floor (attic). The plan is to have the phone hub in the utility room, installing a router and a switch there, and from there to connect the rooms with double outlets and double CAT7 cables.
The electrician charges quite a high price for this and, what confused me greatly, wants to run the LAN cables inside conduit (empty pipes), supposedly for protection. However, despite the conduit, you would not be able to replace the cables later! Does this make sense? Is there a relevant DIN standard or is it common practice not to lay the cables openly? Who has experience with this or has already done it this way? So far, we have only arranged for the pulling in of the cables with termination on the outlets. The rest of the work in the utility room has not been included yet!
Would it possibly be feasible for a layperson to do this work themselves? The ceilings are still open, the cables will be laid along the rafters, and horizontally there are installation cables or the walls are not insulated everywhere, so cables can be pulled there.
Thanks in advance for professional feedback.
Best regards,
Charly
Since I haven’t found anything about this online or in forums, I’m posting the question here again.
We have contracted the interior work through the general contractor, which unfortunately includes the electrical planning. Of course, the standard package does not include any LAN cabling, which the electrician charges extra for. Is a price of 300 gross for positioning the CAT7 cable and pulling it through a house with a floor area of 130 sqm (1400 sq ft) reasonable or too expensive? (Only one LAN cable; the price doubles for two.) Terminating the data cables and installing the network outlets is charged separately.
We are getting a prefab house (timber frame) with a ground floor and an upper floor (attic). The plan is to have the phone hub in the utility room, installing a router and a switch there, and from there to connect the rooms with double outlets and double CAT7 cables.
The electrician charges quite a high price for this and, what confused me greatly, wants to run the LAN cables inside conduit (empty pipes), supposedly for protection. However, despite the conduit, you would not be able to replace the cables later! Does this make sense? Is there a relevant DIN standard or is it common practice not to lay the cables openly? Who has experience with this or has already done it this way? So far, we have only arranged for the pulling in of the cables with termination on the outlets. The rest of the work in the utility room has not been included yet!
Would it possibly be feasible for a layperson to do this work themselves? The ceilings are still open, the cables will be laid along the rafters, and horizontally there are installation cables or the walls are not insulated everywhere, so cables can be pulled there.
Thanks in advance for professional feedback.
Best regards,
Charly
K
Knallkörper5 May 2017 09:03Mycraft schrieb:
two individual cables are usually cheaper than the same amount of duplexI have actually observed the opposite. However, the difference is negligible anyway. We are talking about 20 to 30 euros of material for an average installation.
C
Caspar20205 May 2017 09:14Mycraft schrieb:
...you can bend the cables as you like, as long as you follow the manufacturer’s installation guidelines...the reason is as described in DIN 18015...data cables can be installed flexibly.Correct, electrical engineers have their own DIN standards. However, LAN or coaxial cables can only tolerate limited squeezing or bending.
For most electrical engineers, a cable is considered properly installed if all conductors can be tested for continuity (in terms of resistance).
With 1/10 Gbit wiring, we have encountered cables multiple times that simply did not perform properly.
cobra1982 schrieb:
Cat7 has 8 wires to fully utilize it. For one outlet, it's better to use one cable, and for two outlets, two cables, right?hbf12 already explained the aspects regarding Gigabit Ethernet and PoE. Another reason is that it is now recommended to install "structured" cabling in general. This means designing cables and outlets to be usage-neutral. For this, all eight wires are needed, since Ethernet uses pairs 1/2 and 3/6 (Gigabit Ethernet even uses all pairs), ISDN uses 4/5 and 3/6, and analog telephones or fax machines use only 4/5. If all wires are connected to the outlets, the usage can be changed without having to add missing wires later. That covers the reasons for using "all eight wires."
In addition, modern data networks are wired in a "star topology" rather than a "bus" like the S0 in ISDN, so each outlet is individually connected. A double outlet is electrically two separate outlets, even if they share the same outlet box. That is why two cables are run to a double outlet. Whether the cable pair runs loosely side by side or glued together is a matter of "personal preference."
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