TMB Frequently Asked Questions Index
TMB Questions
Ampacity/Electrical
"Legality" Questions
Cable
Questions
Connector
Questions
Control
Console Questions
Expendables/Accessories
Questions
Fixture
Questions Lamp Questions
Lighting
Effects Questions
Trussing/Rigging
Questions
Check out our FASQs as well!
Frequently Asked Questions
AMPACITY/ELECTRICAL "LEGALITY" QUESTIONS
Can a cable rated at 100A support a
full continous 12K load?
Yes (unless your voltage is below 120 Volts):
At 120 Volts a "12K" (12,000 Watt) load draws 100 Amps.
At 240 Volts a "12K" (12,000 Watt) load draws 50 Amps.
What is the maximum length of cable
for 1000 watt loads in 16 gauge, 14 gauge, 12 gauge and 10 gauge?
|
Wire Gauge
|
Voltage Drop
|
Maximum Length
|
|
#16
|
1V/100'
|
470'
|
|
#14
|
0.6V/100'
|
1600'
|
|
#12
|
0.4V/100'
|
4200'
|
|
#10
|
0.25V/100'
|
9000'
|
What's the difference between ETL
Listing & UL Listing?
None. UL is more widely known, which may have some marketing
benefits, but ETL is a "Nationally Recognized Testing Laboratory" and products
that are ETL approved
Is a "Sister-lug" "legal"?
The Sister-Lug is a type of bussbar clamp used for feeder
connections in the West Coast Studio Industry. Approved and "legal" versions
are available from TMB (The "ProLug") and Mole-Richardson.
Is a "Studio Pin" "legal"?
No. The NEC requires connectors used on feeders to be "Listed
and of the locking type" - the traditional "Studio-Pin" is neither.
Should I buy Type W feeder cable
or Entertainment Grade? Are they both equally
"Legal"?
Listed "Type W" and "Type SC" (Entertainment Grade) feeder
cables are both specifically mentioned in the NEC as "legal" for entertainment
applications. TMB supplies both types: The "Type W" feeder cables are more
durable, but also heavier and more expensive. The "Type SC" feeder cables
are less durable but also less expensive and lighter in weight. The "Type
W" is also approved for a wider range of applications than the "type SC".
TMB would recommend "Type W" for general use and "Type SC" for certain
applications such as on studio lots.
Are regular E1016
Cam-Loks legal or do I have to use the Posi-Lok or something like it?
Regular E1016's are only legal when used by "qualified persons".
If your feeder connections are not being made and unmade by qualified,
trained professionals, you must use some kind of Interlocked system, such
as the Cam-Lok "Posi-Lok"
Is all "Type W" cable legal?
No. Type W is available in versions that are not UL Listed,
these versions are not allowable for Entertainment Industry applications.
CABLE QUESTIONS
What is the standard wiring for an ACL
bar?
ACL's are usually 28V. Therefore, an ACL bar is wired in
"series" (4x28V=112V).
What's the difference between a Fan-out
& a Break-out?
Nothing, they're the same thing. These terms apply to a cable
assembly which distributes control or load circuits "out" of a Multicable
carrying multiple circuits. It typically comprises a multipin connector
wired with several individual cables, one for each circuit.
Can I terminate my multicable directly
to stage pin connectors or do I have to always use a breakout?
No: The conductors of Multicables used in stage lighting
load distribution are not designed to be "splayed out" `to multiple connectors,
doing this could be dangerous. A breakput assembly or some kind of transition
device should always be used.
Is your DMX cable shielded/UL Listed?
Yes and No: All ProPlex Data cables are shielded. The ProPlex
"T" series is "UL Recognized" and as such is suitable for permanent installations,
however it is not "UL Listed". Typically, Listed status is only a necessity
for cables which carry Mains Voltage.
Will your cables make my P.A. systems
Buzz?
Yes, unless they are used correctly. Cables do not cause
PA noise problems. Incorrect use of cables can cause such problems.
Can you use mic cable for DMX?
No: DMX is a digital control signal (RS485) that needs a
true, low-capacitance, control cable. Although mic cable wired to 5-pin
XLR connectors may seem to work OK, there is a great danger that there
will be problems, when you expect them least. We would say you should use
the best possible cable, so that when problems do arise with your DMX equipment,
you can eliminate the cable as the cause of trouble.
Can I use 2/0 cable for dimmer pack
feeders?
Yes, as long as the type of cable used is approved for such
use and the dimmers are not drawing more than the rated current carrying
capacity. The feeder cables typically used in the US' Entertainment industry,
Types SC and W, have a 290 Amp rating for size 2/0.
Do you sell 2/0 Type W/Entertainment
cable
Yes and No: "Type W" and "Entertainment" (actually "Type SC")
are 2 different types of feeder cables. TMB sells 2/0 cables of both types.
Can I get 5-wire feeder all in one cable?
No. Multicables are not designed to have the individual conductors
"splayed out" to individual connectors. A high power "fan-out" is not practical.
How long should my feeder tails be?
That is up to you. Most customers order 10 foot feeder tails.
What is SC Cable? Is it the same as
EISL Cable?
Yes: "Type SC" is the designation in the NEC for cables previously
known as "Entertainment Industries Stage Lighting"
CONNECTOR QUESTIONS
What is the pin out on a 7-pin Socapex?
There is no standard wiring on a 7-pin connector for motor
control. Normally the center pin, (#7), is used for the ground. However,
the pins used for control and the pins used for power vary from rental
company to rental company. Usually they are in groups - [1,2,3, control],
[4,5,6 power], or [1,2,3, power], [4,5,6 control]. There is no industry
standard, so you should always double check the wiring of any equipment
that is sub rented and used with your gear. The reason to double check
your gear is that 7-pin connectors carry power and control together and
there is a potential for harming the equipment or the operator if the wiring
configuration is not confirmed.
What does the 19th pin of a Socapex
do?
Socapex has become a generic term applying to the types of
connectors commonly used for "6-circuit" lighting load distribution. In
the normal 6-circuit configuration, the 19th pin is not used.
Do VSC & Socapex mate?
VSC stands for "Veam Socapex Compatible". The Litton-Veam
VSC series of connectors is fully compatible with Socapex "419" series
connectors.
What is the standard wiring of 6-circuit
cables using Socapex compatible connectors?
The standard wiring of 6-circuit cables using Socapex compatible
connectors is:
| CIRCUIT NUMBER |
HOT |
NEUTRAL |
GROUND |
| Circuit 1 |
pin 1 |
pin 2 |
pin 13 |
| Circuit 2 |
pin 3 |
pin 4 |
pin 14 |
| Circuit 3 |
pin 5 |
pin 6 |
pin 15 |
| Circuit 4 |
pin 7 |
pin 8 |
pin 16 |
| Circuit 5 |
pin 9 |
pin 10 |
pin 17 |
| Circuit 6 |
pin 11 |
pin 12 |
pin 18 |
What is the standard wiring of 12
circuit cables?
The standard wiring of 12-circuit cables using "Pyle"
type 37-pin, 20 Amp connectors is:
| CIRCUIT NUMBER |
HOT |
NEUTRAL |
GROUND |
| Circuit 1 |
pin 1 |
pin 2 |
pin 3 |
| Circuit 2 |
pin 4 |
pin 5 |
pin 6 |
| Circuit 3 |
pin 7 |
pin 8 |
pin 9 |
| Circuit 4 |
pin 10 |
pin 11 |
pin 12 |
| Circuit 5 |
pin 13 |
pin 14 |
pin 15 |
| Circuit 6 |
pin 16 |
pin 17 |
pin 18 |
| Circuit 7 |
pin 19 |
pin 20 |
pin 21 |
| Circuit 8 |
pin 22 |
pin 23 |
pin 24 |
| Circuit 9 |
pin 25 |
pin 26 |
pin 27 |
| Circuit 10 |
pin 28 |
pin 29 |
pin 30 |
| Circuit 11 |
pin 31 |
pin 32 |
pin 33 |
| Circuit 12 |
pin 34 |
pin 35 |
pin 36 |
Pin 37 is blank in this configuration.
Can you use Socapex for 8 or 9 circuit
load distribution?
Yes, although we would not recommend it. The predominant
standard is for 6-circuits and there are many benefits in having "industry-standard"
wiring. However, we do have a few customers who use "Socapex" type connectors
for 8 or 9 circuits and our assembly shop does fabricate 8 or 9 circuit
cable-assemblies to order.
Do you sell a Rosco Bates manufactured
by Advance Devices?
Yes and No: "Bates" is a generic term used mostly in West-Coast
Studios to describe the "Stage-Pin" or "2P&G" connectors which are
commonly used, in 20, 60 and 100 Amp sizes, in Stage and Studio Lighting.
Rosco and Advanced Devices are 2 brand names of connectors of this type.
Both are available from TMB.
Do you carry Cam-Lok helox devices?
No. "Cam-Lok" and "Helox" are the trademarks of 2 different
manufacturers. In the entertainment industry, the term "Cam-Lok" is used
to describe the most widely used locking single-pole feeder connectors.
For many years, the Cam-Lok brand was the only connector of this type available.
Now other manufacturers, including "Helox" are marketing connectors with
claims they are "Cam-Lok compatible". TMB only stocks and sells the original,
tried-and-tested, "Cam-Loks"
Is the Cam-Lok water proof?
No. The "Cam-Lok" E1016 and E1015 connectors common in the
entertainment industry are UL-Listed for dry locations only. Equipment using
these connectors must be protected from moisture.
How do you assemble a Cam-Lok?
You could make your life easy and have TMB install the
connector for you. If you need to do it yourself, remember the following
tips:
1. Lots of WD40 or silicon spray.
2. Do not cut the boot back too far. You want a tight seal!!
3. Make sure to carefully line up the insert stud with the boot receiver
before pulling the boot over the insert.
4. Always pull, never push.
5. Use a rag to pull the boot.
Do you have a 200 Amp female Posilok
output?
No: The output (or outlet) connectors in Cam-Lok's 200
Amp Posi-Lok series are "dead-front males", meaning a male contact with
an insulated tip.
Is the Cam-Lok a locking device?
Yes: Cam-Lok E1016 and E1015 connectors are UL Listed
as "Locking connectors"
Is it standard to have the sex of
Neutral & Ground Cam-Loks reversed?
No: There is no standard
Is a 400 Amp Posilok a wall box?
No. The Cam-Lok Posi-Lok is a sequentially interlocking
single-pole connector system. Posi-Lok output and input panels can be,
and sometimes are, mounted in "Wall Boxes".
CONTROL CONSOLE QUESTIONS
Where can I find multi-sync monitors
for lighting consoles?
Standard computer monitors are compatible with most lighting
consoles. For example, NEC Multi-sync monitors, available from the computer
store. are useable where multi-sync monitors are required.
EXPENDABLES/ACCESSORIES QUESTIONS
Do the sandbags you sell come with
sand?
Yes or No. We supply sandbags however they are specified
by our customers.
Which is the male side of Velcro?
The "male" side is the side with the "hooks" on it, as
opposed to the softer, fuzzy "female" side!
Is your gaffers tape really sticky?
Does it leave residue?
Yes. All gaffers tapes can leave a residue. However, the
Permacell 665 and 672 gaffers tapes featured by TMB provide the optimum
combination of maximum adhesion (stickiness) with minimum residue.
How long will my 9-volt batteries
last?
This is impossible to answer, as it depends on many factors.
You can be assured, however, that the ProCell batteries supplied by TMB,
are the best batteries available and that they are fresh and will give
you the maximum life expectancy.
Is the DF-50 a fogger or a hazer?
REEL FX DF-50 is a "hazer" and is not designed
to make "clouds", but to provide a transparent sustained mist to reflect
light.
Do I have to use the manufacturer's
fog juice in my fog machine?
No: However, for peace of mind and avoidance of any possible
hassles, we would recommend using fog juice from the manufacturer of the
machine you are using. There are some good after-market fluids available,
but it is definitely a situation of buyer beware.
Can you use fog juice in DF-50's?
No: The DF-50 uses special juice. Regular fog juice will
not work and may damage the DF-50.
What is a "hank"? How many feet are
in a hank.?
A "hank" is a unit of measure for cord, rope, and tie
line. There is 100' per hank.
FIXTURE QUESTIONS
Is your Par can silver or chrome?
Neither. The Polished Aluminum TMB ProCan has a very lustrous,
shiny finish which is often referred to as "Silver" or "Chrome".
What is the difference between a
snoot & a top hat?
Nothing. These terms are used for the same piece of equipment:
a tube mounted to the front of a fixture, normally an ellipsoidal, to control
light spill.
What is the difference between a
PAR 20 and a PAR 16?
All Par numbers are a measure of the lamp diameter in 1/8"
increments . PAR 20=2.5", PAR 16=2.0"
Is the ETC Iris compatible with Altman
Ellipsoidals?
No. The ETC Iris does not fit in any of Altman's ellipsoidal
fixtures
What's the standard lamp for an 8-lite
unit?
There is no standard. Any PAR 36 lamp will fit. However,
the 2 screw terminal 120V DWE or FBO are most common.
Can you interchange all ETC Source
Four lens tubes on any of the ETC ellipsoidal bodies?
Yes, you can interchange the lens tubes with the bodies.
It is suggested, however, that if you are using any 5 degree tubes, you
should use the ellipsoidal body with two clutches on it since the weight
of the lens tube in addition to any accessories may cause the unit to tip.
Does ETC make a zoom ellipsoidal?
Yes. The Source Four Zoom was introduced at London's PLASA
Show in 1998. This fixture uses the HPL Lamp. It is available in 2 sizes, 15
- 30 degree, and 25 - 50 degree.
LAMP QUESTIONS
What is the difference between an
HMI and an MSR?
HMI and MSR are manufacturerer names that have become
industry standard. Both lamps are metal halide discharge lamps, MSR just
means "medium source rare earth".
What is the difference between the
800hr & 2000 hr par 64's?
The difference between the 800hr and a S/B 2000 PAR 64
is:
cost, color temperature, candle power, beam angle, lumens, and there is
no VNSP, very narrow spot, available in the S/B 2000.
What is the difference
between the 300hr & 2000hr HPL575 lamp for ETC fixtures?
The 300hr lamp is 575W @ 120V, burning at 3,250 degrees
Kelvin. The 2000hr lamp is 115V and burns at 3,050 degrees Kelvin.
Does a PAR 20 and
a PAR 16 use the same lamp?
No. The PAR 20 takes an E26 or E27 medium screw base. TMB
PAR 16's use an E17 intermediate screw base.
Is there a difference
between an E26 and an E27 type lamp base?
Although you would think there would be, the answer is
no.
LIGHTING EFFECTS QUESTIONS
Is the Aquaram
water proof?
No, the term "waterproof" implies the ability to function
under water. However the Wybron Aquaram
is a scrolling colour-changer that is designed and built to operate in damp,
outdoor applications. Our customers' experience has shown this unit to perform
reliably in rainy, wet environments.
Are
Cyberlights, Golden Scans or RoboScans available in 12OV?
Yes and No: Cyberlights and Roboscans are available in
120 Volt versions. The Golden Scan is only available in 220 Volts.
Will Wybron changers
work off of Rainbow power supplies?
No.
TMB QUESTIONS
Are you a Rental
Company?
No, absolutely not. Throughout our history, TMB's number
one market has been the professional rental companies. TMB takes great
care not to compete in its customers' markets.
Do you sell Christmas
lights?
Yes. TMB provides everything a Lighting Company might
need, including standard or custom light festoons! How many miles would
you like?
Are
you open on Saturday?
Yes: Our Sales office is not open over the weekend, but
you can always reach us on our 24 hour pager (818-829-6116) to arrange
an emergency shipment or to get an answer for an urgent question.
What does F.O.B. mean?
"Freight on Board" The "FOB point" is the place from which
our customer is responsible for the shipping costs of an order.
TRUSSING/RIGGING QUESTIONS
Are spansets legal for permanent
installations?
No. Permanently installed rigging equipment must be fire-resistant,
which spansets are not.
Is my Tomcat/Thomas Lighting truss
compatible with those of other manufacturers?
Yes and No. While there are several brands of truss that
will intermate - the holes match up - the mixing of truss from different
manufacturers is never recommended because of liability issues.
For joining truss together, which
is stronger? Bolts or Cam-Locks?
Bolts. As long as you are using rated "Grade 8" nuts and
bolts with substantial washers on both sides of the joint. TMB recommends bolts
for most applications.
What length of chain do I use for
a 30' G/S motor?
The length of chain you want to use for a 30" G/S motor
is 72 1/2'.
Do TomCat, TFL & Thomas trusses
inter-mate?
Yes, but not advisable. While several brands of truss
do intermate, the mixing of truss from different manufacturers is never
recommended because of liability.
What are the standard twist-locks
for chain motors?
There is not a standard.
Can I use 12x12 Light Duty
Truss for Ground Support uprights?
No: 12X12 Light Duty and 12X12 Tower trusses look quite
similar. However the construction is different. Light Duty must not be
used as an upright, but Tower will function regular truss or as an upright.
What are the standard sizes of rigging
steel?
3/8" wire rope is used for 1-ton rigging. 1/2" wire rope
is used for 2-ton rigging.
If there are any questions you frequently ask, let
us know!
Last revised: January 19, 1998