Bicsi Chapter 4: Cabling Support & Space Prep Terms With complete verfiied solutions already graded A+

Plan for a minimum of ____ft of front and back work space & aisle space between & around equipment.

3.3ft

A luminaire is a complete electrical unit used to create _______.

- Artificial Light

It is recommended TR's have 3/4in thick A-C rated fire-retardant plywood backboards installed on at least two walls of the TR.

True or False

True

An ____in minimum wide cable tray should be mounted on the same walls as the backboard.

12in

Conduit ends should be positioned adjacent to the _______ of the backboard or in the _____________________ of the room.

- Left side

- Left most corner

Plywood should be void free.

True or False

True

The space in each layer inside the plywood where the knotholes are removed is completely filled with replacement ______.

Wood Patches

Voids inside a sheet of plywood may create a _______ where the attachment hardware cannot hold fast.

Weak spot

The plywood should contain no more than ____% moisture to prevent warping.

15%

The ___ side is exposed to the interior pf the TR, & the ___ side is placed against the building structure or cabinet wall.

- A

- C

For ICT systems use, start mounting the plywood ___in AFF.

8in

BICSI strongly recommends that plywood be painted with ___ coats of fire-retardant paint.

Two

Some local codes may require use of fire-retardant plywood. If this applies, it is not recommended to paint the plywood.

True or False

True

Plywood sheets used for backboards should be installed with the longest dimension reaching from ____in AFF to an installed height of ____ft.

- 6in

- 8.5ft

When installing the plywood, use galvanized screws that are a minimum of ____in longer than the depth of wall covering, including plywood.

0.5in

Toggle bolts should be a minimum of ____in in diameter.

0.25in

Toggle bolts may be installed at ___in spacing around the entire perimeter of the plywood board.

24in

Use of drywall screws as an attachment method is acceptable.

True or False

False

The toggle bolt should be installed __in from the edges of the sheet of plywood on a maximum of __in centers.

- 2in

- 24in

Floor, wall mounted cabinets and racks all have common installation and setup issues, including:

- Attachment

- Bracing

- Design Layout

- Cable routing & management

- Bonding & grounding

What're the four popular standard-based thread sizes for mounting screws?

- M5

- M6

- 12-24

- 10-32

The top of the floor-mounted rack must be connected to the:

- Wall

- Support barrier

- Cable runway

- Cable tray

Most equipment designed to be placed in racks is defined by the amount of space it requires in a rack.

True or False

True

The minimum spacing in a rack is considered ___ RU.

One

One RMU is equal to ____in.

1.75in

Cables should be routed on the rear sides of the cabinet or rack using cable management hardware attached to the rear of the cabinet's or rack's vertical channels or in cable management channels mounted vertically on the sides of the cabinet or rack.

True or False

True

Labels should be placed or affixed at the top of the cabinet or rack and centered between sides.

True or False

True

In data centers and other applications which have a higher density of cabinets or racks, an additional label may be required on the back, as well as the front.

True or False

True

It is generally recommended that cabinets be placed with one edge flush with the floor tile cut line to ensure that no more floor tiles than necessary are captured and to minimize the distance required to reach under cabinets.

True or False

True

Rows of cabinets & racks should be placed parallel to the rows of floor tiles.

True or False

True

Which methods can be used to secure cabinets and racks to the underfloor or permanent slab?

- Attachment to metal struts by 2 or more access floor stringers

- Attachment to metal struts to the permanent floor

- Attachment via threaded rod directly to the permanently floor

- Attachment to channel bases bolted to the floor slab

Leveling foot adjustment or shimming of any anchoring point should not exceed ___in unless specified by the project manager.

0.50in

Clearance from the bottom of the access floor tile to the top of the cable tray or other raceway shall be at least ___in to permit cable bundles and innerduct to exit out the top of the tray without incurring damage.

2in

These underfloor cable trays may be supplemented by a duct or tray system to manage optical fiber jumpers, patch cords, & equipment cords.

True or False

True

There should be ___in and no less than ___in clearance between layers of underfloor cable trays run in parallel and stacked directly above each other.

- 12in

- 6in

Where foam matting is used as an underfloor pathway or containment, it should be a minimum of __in thick and fill the aisle between the floor pedestals.

0.5in

Foam matting shall be secured to prevent lifting where cables are low or not present and to prevent disturbance of the underfloor airflow.

True or False

True

D rings should not be used as a substitute for ladder rack or cable tray.

True or False

True

Light should be a minimum of _____ft-candles

50ft-candles

28 AWG equipment & patch cords feature an insertion loss deration factor of ___.

1.95

When using 28 AWG cords, the installer will not be able to utilize an ___ft channel.

328ft

If __ft of 28 AWG cord is used in a cabling channel, the horizontal cable run length will be derated to a maximum of ___ft for an overall channel length of ___ft.

- 33ft

- 270ft

- 303ft

Cabling support systems include the following:

- Plywood backboard, clamps, rings, & hangers

- Cable trays & associated support hardware

- Cable runway & associated support hardware

- Conduits & associated hardware

- Enclosed cabling pathways & associated support hardware

- Open-top non-continuous cable supports

Minimum separation for electric motors & transformers.

48in

Minimum separation for neon lamps.

6in

Minimum separation for arc welders.

31.5in

Heavy duty installations typically use ___in size rod.

5/8in

Cable retaining posts are available in __in to __in lengths to allow additional cables to be installed to a depth exceeding that of the cable runways.

- 6in

- 12in

Supporting attachment should be applied on a cable tray not more than __ft from the end and on each side of a joint between two sections. Additional supports are required every __ft thereafter.

- 2ft

- 5ft

A steel or fiberglass wire rigid enough to be pushed all the way through the conduit, or in longer runs to a pull box is called a:

Fish Tape

Fish tape is used to retrieve the pull string or rope from the far end.

True or False

True

Air-propelled devices include:

- A vacuum on one end and a foam ball attached to a pull string on the other end

- A compressed air bottle or mechanical blower used to propel a pull string attached to the propellant object

What is step 1 in placing a pull string in conduit with fish tape?

- Determine the length of the fish tape required. After estimating the length of the run, add a few feet to each run to be sure enough fish tape is available.

Fasteners fall into the following categories:

- Screws

- Bolts, nuts, & washers

- Specialty fasteners

All poke-thrus installed need to be listed for the purpose and location and installed per manufacturer's instructions.

True or False

True

Floor openings for poke-thru devices will typically be performed either during the floor construction for a new building by a general contractor or by a specialty contractor in an existing building.

True or False

True

Open-top cable supports should not be used for installations of more than __ cables.

50

Open-top cable supports should be attached to the building structure and installed on a center spacing varying between __ft to __ft.

- 4ft

- 5ft

Where not specified by the AHJ, open-top cable supports should be installed to maintain a minimum __in vertical clearance between the cabling and cabling supports and elements such as ceiling tiles, electrical conduit, luminaires, and piping & ducting.

3in

ENT must be securely fastened every ___in so that it does not bend when pulling cable.

35.4in

If FMC must be used, limit the length to __ft and increase the conduit diameter by one trade size.

20ft

The 2 types of couplings used to join sections of EMT are:

- Compression couplings

- Setscrew couplings

No more than __ 90-degree bends are allowed in any one-conduit segment.

Two

A third bend may be acceptable in a conduit segment without derating the conduit's capacity if any of the following exists:

- The run does not exceed 33ft

- The conduit size is increased to the next trade size

- One of the bends is located within 12in of the cable feed end.

A hand bender can be used in the field to bend ____trade size up to ____ trade size.

- 1/2 trade size

- 1-1/4 trade size

The inside bend radius shall be ___ times the internal diameter of the conduit when used for optical fiber or trade size diameters greater than __in.

- 10 times

- 2in

If the conduit is 2 trade size or less, the bend radius must be at least six times the internal conduit diameter.

True or False

True