With outside scores, OSP belden cable price list stands out from traditional indoor-rated copper or fiber cable for its potential to keep up efficiency regardless of harsh environmental conditions. It’s designed to resist flooding, moisture and high and low temperatures, and resists abrasion and tearing, permitting you to extend your network outside, reaching across a big campus.
There are some common functions that continuously call for OSP cable – we’ll cowl them here.
Conduit in Concrete Slab
Many new facilities being built at present are an excellent instance of conduit in concrete slab applications. In a number of of those projects, you’ll discover the conduit (plastic PVC or metal EMT) sticking up out of the concrete slab. The conduit usually utilized in these applications is designed to run wires and cabling from a centralized location to many specific places or endpoints. But, oftentimes, inside this conduit, you’ll discover indoor-rated cable – a typical Category 6A cable, for example.
This situation represents three frequent errors made in applications where listed OSP cabling – cabling certified by UL – is best suited:
Believing that the conduit is actually in an indoor application because it’s underneath the roof (when, in truth, the conduit extends past the building envelope – below the slab)
The project staff assumes that standard, indoor-rated cabling will carry out properly in out of doors purposes so long as it’s protected
The project group assumes that conduit is sufficient of a protector for indoor-rated cable
As any contractor or building proprietor will let you know, buildings move and crack as they age and settle. Finally, because the ground and concrete shift, conduit may be damaged. If the conduit cracks, water can infiltrate the conduit. If the cables inside that conduit are indoor rated, we’ve acquired bad news: They’re not designed to deal with any moisture – so the cables won’t be able to maintain performance. The tip end result? Network downtime, damaged cables and the need to rip up and exchange cabling infrastructure and conduit.
Differential temperatures can also cause damage to indoor-rated cables put in in conduit. When ground temperatures are cold, however above-ground temperatures are warmer, a high-pressure atmosphere is created where air may be sucked in. Typically, air that is warmer has a higher moisture content. When this warm, moist air meets the colder temperatures beneath the concrete, condensation occurs, creating moisture. The moisture can acquire on the inside of the conduit; if the cables inside that conduit are indoor rated, damage to the cable will occur – even if the conduit itself isn’t damaged.
Let’s consider a state of affairs the place the conduit rises from the slab at the lowest level of the building. What if this lowest point is in the basement, and flooding occurs from excessive rain, a burst pipe or a bathroom overflow? What if the flooding was high enough that it flowed into the top of the conduit? As the rain subsides, or the plumbing failure is fixed, the floodwater would be removed from the ground of the basement by means of a pumping system or moist-vac, but not from the conduit. Water would stay in the conduit. If the cables inside that conduit are indoor rated, they are going to be damaged over time.
However how will you ever know if there’s a break, crack or water in the conduit within the first place? During building, it’s buried and hidden – once it’s placed underground, you’ll possible by no means see it again. One strategy to protect an indoor-rated cable in a conduit is to seal and pressurize the conduit. With a sensor to monitor the PSI ranking, you could be notified of decreases and have time to investigate a potential downside early on; nevertheless, a pressurized system isn’t sensible or cost efficient for a typical enterprise. Most individuals received’t realize that the beneathground conduit has water and is damaging the indoor-rated cabling within until it’s too late – and network performance problems are obvious.